positive

Me and my husband been planning to have a baby for 1 year already. We only have sex twice a week because of the hectic work schedule.. last Nov 25 I had my last period. Dec 23 I went to an OBGYne she gave antibiotic that I will insert in my private part for 7 days then she gave me vit c and folic acid after my meeting with her nothing happen between me and my husbdand( sex). Jan 6 since I dont have my period yet I tried to use PT and its positive. I did it 3 times and still positive.. the question is is there posible that I'm pregnant even I put/insert antibiotic in my private part?