Hello Doc , Need Urgent Reply I Am A Bit

Hello doc ,
Need urgent reply I am a bit worried actually i was having an irregular periods i got my last periods on 19 june 2015 and did not got my period in july and august i visited the doc on 20 august 2015 she told to hav a blood test for pregnancy and if there is no pregnancy then i can start taking primolut nor 10 mg one tablet daily for six days. So i got the report negative then i started primolut nor on 22 august 2015 till 27th august 2015 ...but till 9 sep i didn't got my periods i went to the doc again on 10sep 2015 she did an ultrasound and i came to know that i m pregnant the foetus was around 6 weeks as doc said coz there was an heartbeat also but it was small looks like an early pregnacy i m worried that the medicine taken by me will it affect my baby in any case plz doc reply as i m too worried..