Antidepressants

I have a history of seasonal depression and throughout my entire pregnancy my husband expressed his worry over me having ppd. Well, seven weeks postpartum, numerous people telling my husband I seem sad or depressed and one huge fight last night, and today I asked to finally be put on something. I'm sad because I really thought I was coping well and that when I was sad it was just hormones. Really, I'm just tired of fighting for people to believe me when I tell them that I'm fine.