Sounds like you're doing the right things. I used to be terrified of April because that's when I would crash. I've been off antidepressants for three years, but it seems more and more I slip back into depressive episodes. The first time it happened I nearly had a panic attack because I was afraid I'd become suicidal again. But it passed.

Anniversaries are so hard. Stay strong. Keep doing the things you know will help. Congrats on grad school.