I need help

So in October I missed my period Bering in mind I was under stressing I missed 3 days worth of pill(I am on the pill) I took 2 pregnancy test they came back negative so then in November I had a period then December I missed it again I missed one pill took another test negative so I went to the doctors I changed my pill and I took half a month of my old pill and half of my new pill and still no period taken a test after going to the doctors and negative again I don’t know what to do I’m so confused anyone have any advice? And it’s not even like he finishes inside me he pull out a good 10 mins before.