Postpartum depression/anxiety

So I’m 8 months postpartum and just now started feeling bad and getting intrusive thoughts and anxiety through the roof as well as some depression and honestly my mood has been everywhere that it was making my head hurt so bad and tell myself I’m better off not being here so I decided to get help and I was prescribed Zoloft. Now that I was prescribed it I feel so scared to take it because I’m scared of the what if’s, what I’f it makes anything worse. What if I grow dependent on it. My physiatrist said 25mg for a week then 50mg for 3 weeks so we can see if it’s right for me. I’m just nervous but I do want relief.