Abductor hallucis strain maybe?

has anyone experienced this? I am wondering how to treat it/ how long it could last?  Or even whether it could be something else

 I'm not sure but I think I have strained this muscle. It started to hurt in the arch of my foot towards the end of a 16 mile run, I was able to finish the run but it has been aching since. The pain is only around the medial arch, mainly on the side, it hurts both walking and running and is worse if I try and wear my orthotics! There's a tender spot over the bone but no swelling or colour change.

 Any ideas what it could be?