Starting back on Lexapro with 4 weeks left of pregnancy

So I have been having the hardest time the past 3-4 months with anxiety and depression during this pregnancy.. alot has been going on and I constantly am crying and just overall depressed . 😔 I've tried therapy I've tried taking time for myself and nothing is working .I'm on Lexapro while not pregnant but once I became I quit cold turkey bc I was scared to death what it can do to baby. I have 2 kids now 6 yr old daughter and 2 year old son. My son is dealing with speech delay and of course I blame myself for it. I have to do deliver at 36 weeks due to myself being a kidney transplant and also tearing from previous c section. I want to feel better about and feel more comfortable and feel less anxious and not feel so depressed but I'm also terrified what the Lexapro will do to the baby! It's 4 weeks low dose . I don't need judgements I just would like some opinions on it . From other moms who have been where I am ? I don't want to feel like I'm " just finding a solution " I want to feel like the mom I used to be again and and be the best version.