Every month I find myself having a week or two of on and off depression. So bad that I feel like life is pointless. Even though I know I will feel better in a few days, it is so hard to see the light at the end of the tunnel when the depression hits. I'm not sure how much of this is due to the hormones I am taking or the endometriosis. It's a horrible feeling and one that I can't stop from coming.
I have this same problem when I'm on birth control, I don't know if that's what you mean by the hormones you are taking or not but my mood seems to be controlled by my birth control. I just got off the nuvaring and got an IUD and my husband has been trying everything he can think of to get me to go back to being off bc due to the vast differences in my mood on and off the hormones. To be honest I have no idea how to overcome the mood swings on hormones, but you are not alone in feeling this way. Sending hugs and prayers you way!