I think that you should go to the doctors ASAP and get that thumb xrayed.
I have had two fingers jammed/broken. I let them both heal on their own now they both hurt when I do certain things. I wanted to try out kickboxing but I couldn't because of my fingers and small things like using your finger at your heel to put your shoes on has to change. I also can't straighten one of them. It is annoying and irritating.
Especially if you play football..... if it is broken, you may want to have the doctor set your thumb properly.