Thanks for all the replies, i eventually got the MRI scan and had to pay for it myself. Its not the most comfortable or quickest procedure - very noisy and i had to do a superman pose to get my hand scan as i wasnt keen on having my whole body in the scanner. I then had to make another appointment with the doctor. He essentially said i was fine and didn't need a splint or anything and referred me to hand therapy to get my finger mobilisation back but i am doing that myself. I think he said there was a bit of fluid build up in the finger and signs of tendonitis but i cant remember now. Im going to go back to training tomorrow though im sure the finger isnt straight now, it still has a noticeable bump to me and it is still a bit painful