Just gone on cerazette as menstrual cycle has become messed up. either skipping or all the symptoms but no bleeding. my mood suddenly dropped and emotional. had depression last year worried its triggered it again. could the pill be causing it?

Progesterone pills: Progesterone only birth control pills often change the menstrual cycle. Typically they are prescribed continuously with no break. This can sometimes cause irregular breakthrough bleeding. Depression is multifactorial especially since you have had it in the past. Consider talking with your doctor about depressions treatment options