What's wrong with my arms/veins?

I'm a fairly healthy guy. I try to jog and eat healthy stuff. I'm not obese or anything, but I'm not very strong. I've never gone to a gym for any long period of time. Just around 11 months ago, I went to Velocity (now Chadwicks in my area) with my soccer team for conditioning. Needless to say, I've lost any and all muscle tone gained from that experience. So here's the story. I was working out with my bro 3 weeks ago. We spent 15 minutes on the treadmill then went on to anaerobic exercises. The main workout that was affecting me was our bicep workout. I think I used 10s or 15s. I don't remember. Our workout was 20, 15, 10 curls for each arm. We did this set twice. Then we did the same thing with the same weights and same reps for concentrated curls. Things were going good, and I was really trying to get in as much stretch/curl length as possible (meaning for the standup curls, I let my arms go down almost to the point of fully extended. Same thing for the concentrated curls. These were the sitting down ones where my tricep was resting on my thigh. I tried to touch the ground with every curl to get the best results). Needless to say, I couldn't bend my arms after this experience. Lol, well I could, but it hurt like CRAP to stretch them out again. It just so happened that the gym was closed for the holidays, so we couldn't go back. I was glad about that, because I didn't know how I could've moved them. I do know that stretching helps, and I stretched both before and afterward. For the rest of the day though, I tried to move it as little as possible. I tried the same thing for the next 2 days or so. I could move both of my arms fairly well by this time. The only problem was a sharp pain in my forearms. I was thinking that I just pulled a muscle or something, and it'd go away within a week maybe. I just rested it and didn't lift anything after this day. I'm going to describe my symptoms (I guess haha) of what I have. My arms are fine when they are bent, but when I try to outstretch either of my arms, the pain starts. I can move my wrist fine, so I don't think that the issue is with any of my forearm/wrist muscles. Unless it is, which is why I'm asking. Hmmmm, It's only in one specific area. It's not my whole arm or anything. Well, this is what I think. I know this probably sounds crazy, but I think I "pulled" my vein. I've heard that veins are like, rubber bands in your arm. If you can imagine this, then imagine what happens when you stretch and release, stretch and release etc. The middle of the rubber band tightens and weakens a little bit. I think that's what has happened to my forearm veins, because the pain is only in the middle. And the pain is only trailed on my biggest vien in my forearm. Like, I can twist my radius bones and skin, and the pain only follows my vein line. Well actually I take it back, it wasn't the pain that I felt when I was experimenting with myself. I was actually following the numb trail. Yes, the "area on my vein" where I feel the pain is also numb. It's like that feeling when you go out in the cold for too long and you try to touch your finger with your other finger. You can feel it, but it feels dead. Imagine that sensation, but without the freezing cold. It's been this way since I've been able to move my arms ( which was 3 days after my workout). I've kind of asked around my family for advice and they just think I've pulled a muscle. They say it'll be totally fine in a week. This was 2 weeks ago, and it's still there. No, it's not as painful as it was in the past when I extend my arms, but the numbness is still there. I would normally totally just wait it out for another week or so, but luck is against me. My soccer conditioning that I was talking about at the beginning is starting up again. The first day is tomorrow. I tried to do a pushup last night, and I could barely move up or down without some kind of pain. The conditioning is as much upper body as it is lower body, so I know that we will definately be doing pushups there. In addition to knowing what's wrong with me, I'm also curious if I should even be going to conditioning tomorrow. I don't know if this pain is just like...healing pain. If that's the case, then I think that some good workouts will build up the muscle in my arm. The conditioning could progress healing. On the other hand, I don't know if my present condition is serious. If I sucked it up and worked out, then really hurt myself, that'd suck as well. So what should I do? If I knew what it was and how soon it should be healing, I could gauge my conditioning better. Am I worried over nothing?