I agree with Knott. this is almost certainly a metatarsal arch issue and could be handled with the right insoles. Just make sure you're getting a pair with the metatarsal arch pad, or add one as Knott suggested.

It is also a good idea to move the cleat back a bit. Try lining up the axel of the pedal with the joint at the base of your baby toe.

Knott, thanks for posting about the Berry. I haven't seen them yet but I'll definitely look them up.