About 2wks ago i jammed my thumb and it hurt for awhile and then went away.know when i put some pressure on it it hurts. what could it be?

Bruise: You probably have a bruised thumb that should gradually resolve. If it does not resolve in another 2 weeks, then see your physician for examination and possibly some investigations.

Thumb pain: Musculoskeletal injuries can sometimes take 3 to 4 weeks to get completely better.If persistent or any deformity or weakness or functional problems seek medical help.

Still healing: So now it doesn't hurt continuously, only when you use it... Its still healing but sounds like it continues to improve. Let is heal. You might need a splint for a while to keep you from aggrevating it.