is taking medicine that is not prescribe can lead of having baby with down syndrome?

I was able to take anti-vertigo medication during my first month of pregnancy. I didn't know I was pregnant that month. I told that to my Ob-gyne and she assured me that it would not have much effect on the baby since I was just the first month of pregnancy. But I was worried because I took that medicine for a week. after all, all the medicine I buy I need to provide a prescription before I buy it from a pharmacist and been diagnosed of having hypergastric pain and bleed 'til now. I'm 23rd weeks pregnant today. 😔 #1stimemom