I am 20 weeks pregnant, and I took one Escitalopram pill for anxiety. Will it affect the baby?

Hi doctor,

I have a question related to my pregnancy. I am currently nearly 20 weeks pregnant with my first baby (19 weeks 5 days to be exact). I had the anatomy scan a couple of days ago, and everything looks great. However, because I have some anxiety, I was prescribed Escitolapram for my anxiety. I took 5 mg in the evening on Thursday, but the next day I felt sick, nauseous, light headed. In short, the medication did not make me feel good. I know it takes a couple of weeks to kick in. However, I have decided to work on my anxiety by myself instead of medicating right off the bat, so I have decided not to continue taking it. However, I am worried that taking one pill could have impacted the baby. Could you let me know if this is the case?

Thank you doctor,

But you do not think that taking just one pill, 5 mg did any harm? I am assuming it is now flushed out of my system, and baby is fine. I would probably need to be on it for a long time during pregnancy to harm the baby. So I am just seeking verification that testing out one pill does not hurt the baby first this time.