post anti-depressants

So I my second child almost a year ago. At my 6weeks check up, I was diagnosed with postpartum depression. All while trying to work my part time job, maintain a household along with my husband and 6yr old AND start up my photography business and trying my best to upkeep an online presence on all of my social media accounts. All of this went pretty well until a few months ago. As I said, my doctor diagnosed me with postpartum and i was immediately prescribed Zoloft. I'm a naturalist and was opposed to taking it for a few weeks but decided to go ahead and give it go once my back was against the wall. Well, i took daily up until January of this year. Only because we've hit a financial crisis and can no longer afford health insurance. Since then, my mental health has seemed to be gone way down hill I second guess myself a lot, I'm struggling to stay on task, I'm overthinking everything, I have thoughts of guilt from not upholding my end in the household, I have no transportation of my own and i feel as though I've been a terrible team mate in my marriage. My intentions are always good but my timing is terrible. I can feel others around me getting frustrated and giving up on me. Including my husband who has supported through everything since we've met. Not sure what to do. Its hard to open up and talk to anyone because i have no friends and i'm not close with my family either. I don't take these thoughts and emotions out on my family, or feel suicidal but i often feel like I'm better off dead. please help me.