I'm pretty sure I have a stress fracture of the 3rd metatarsal (I run). 111 were useless, said RICE and should be better in a couple of days 
Should I go to GP? Ask for MRI? Or A&E knowing that it is likely to not show up for a couple of weeks on XRay. I feel like I could do with a crutch as walking really hurts.
Any advice? Should I self treat or go to docs/A&E?