Depression?

I don’t even know where to start. I feel fine one minute and then really really bad the next. I don’t even know why but I feel like it is getting more frequent. At first I thought it might be the pill. I was on microgygon 30 for about a year and when I got sick of feeling like this, I switched to femodene. I have finished the first strip of femodene but has anyone been through this? I really hate feeling like this. I have told my boyfriend but other times I don’t want to tell him that I’m having one of these days because I don’t want him to blame himself. Does anyone know how to help?