Lately I've been thinking a lot about a fairly traumatic event that I thought I had gotten over - until now I hadn't felt anything about it or given serious thought to it in 3 years. But recently(~3 weeks) I've been remembering it a lot, feeling panic-y and stressed and upset when I do. I also started having nightmares again and my overall anxiety levels seem to be higher. I'm worried I'm not really over it, or that I'm heading backwards. I need advice.