Trigger warning: PTSD and sexual violence

When I was in high school I was brutally raped by my significant other at the time. Ended up pregnant but ended up almost forcing a miscarriage by drinking and smoking excessively. Because of vivid dreams with pregnancy I have been having a lot of flashbacks to this event and I’m having trouble sleeping and coping with my PTSD hitting hard again. My husband has tried to be supportive but he’s not sure what to do. What can I do??? I can’t afford therapy right now and this lack of sleep is really triggering my migraines. Help.