Lack of motivation.

Does anyone else experience this even while on meds? I’m on two antidepressants and have been for 4 months but sometimes like today o just feel off, I can’t shake this sad feeling. It makes me question if life is worth it? I just feel weird. I wouldn’t do any harm to myself but it alarms me that I still sometimes feel this way. Could it be related to less estrogen while breastfeeding? I just want to be my old happy self again.