Period depression

In the days leading up to my period I get severely depressed - to the point where I feel like my life is meaningless and I have no motivation to live anymore. I am already diagnosed with depression and take medication that has it under control - the rest of the month I feel fucking great (compared to my struggles in the past), so it’s very hard and discouraging to get to the time around my period and suffer a downward spiral. I got my period today, to no surprise, because I’ve been extremely down this whole week, hating myself. Hopefully the symptoms subside by tomorrow because I feel like this is the lowest I’ve felt for the longest time and I don’t know how much longer I can go on.