I've injured something around my ulna bone twice.

[ScaredKidSmh]

Okay, so I had a direct blow to the ulna while defending myself from thieves. Lucky I had fought them off, but I wasn't able to rotate my arm at all, or do any push-ups. But I had this little bump thingy on my ulna. I thought it was broken, and I was like "oh well, you're gonna cry at the hospital". But I was lucky. It wasn't broken. So after 2 weeks, I felt great, could play tennis, could rotate my arm, not as much as my other arm, but I could function with it normally. So I went to extreme water sports park. I thought that water wasn't that hard at high speeds, so I turned over, hit again, bump reappears, just a bit larger than the first time. I can rotate my arm almost as the other, but when it comes to its limit, it hurts. When I do instant actions, it schocks the arm, hurts for a minute, and then resets. One of my doctors told me that it was a ligament, but I have no idea. I'm too scared to check it out because I might face the "rebreaking" or "reseting" the bone. AND I've experienced it. It was way too much painful to let me do that to me again without anesthesia even if it was life-threatening. So, does this look like a broken bone, can't fully rotate, can function normally but bit limited, can't carry heavy stuff, can do but in pain some push-ups, and have a bump close to my wrist. I've read that it could be some kind of a nerve, and it said that It takes 6 weeks to recover, and I injured my arm 3 weeks ago first time, and 1 week ago the second time. I feel a lot better, but I don't want screws in my arm in like 3 years. HELP!