I suspect I may have central nervous system damage to my scalp causing all over hair loss. What treatments can stop this?

I was recently on accutane (20-30mg x2 daily) for 8 mo. Now off for 6 mo. In that time I've been experiencing extreme hair loss and sever scalp pain. Touching my hair, changing its part, it all hurts. My dermatologist says I don't have alopecia. I have no signs of irritation, redness, etc. Is it possible my central nervous system has been damaged? If I can solve the pain maybe it will fix the hair loss. I'm currently pregnant. I want to know what can be done, whether it's during or after.