I understand what you're talking about this can be very worrying. You should go to the doctors as you may have a chance that it could be testicular cancer so don't waste any time.
If it's a small bump on your tongue, chances are it's what is called a 'canker' sore...it just randomly appears on your tongue or your gumlines....basically for that, time heals it up. You can go buy...
I'd suggest a warm bath it relaxes your muscles and feels great im pregnant and I always use a hot water bottle (not too hot) to lay down with to take the pain away, also swimming helps as you are...