Hi Jessica,
Welcome and I'm very glad you found us. Congratulations on your decision to lead a sober life. I dealt with depression by drinking. I couldn't get diagnosed and treated correctly and as a last resort turned to drinking. Of course, that started a whole new set of problems.
I believe there is some information on flashbacks on the Post Traumatic Stress Disorder forum on this board.
I hope you hang around and find the information you're looking for.
Love, Anna