I punched a friends knee over a month ago and my arm still has three lumps plus my thumb is longer and under that it looks like my wrist is caved in?

Get help! If it's that old of an injury, and still bothering you with deformities you've listed, it would be a good idea to have an urgent care or sports med doc check it out. You could have fractures or hematomas. Regular soft tissue injury shouldn't last this long. Good luck!