Sertraline while pregnant

I used to take anxiety medication before I was pregnant.. Well I thought I was fine because I was doing good so I stopped taking it because I found out I was pregnant and I didn’t wanna take anything aside from the prenatals if I didn’t have to, we’ll now I’m 26 weeks pregnant and my anxiety is horrible. Not only that I had really bad postpartum anxiety with my last baby a year ago. So I’m wondering if it’s best to go back on it my doctor said that it was fine however I just wanted to see if anyone had experience with it and if your baby had like withdrawals or anything like that because I don’t want to do anything like that but my anxiety is getting really hard