Hello. I am Tanaya 27 years female. I had PCOS. And I lost 10-12 kgs in last 4 months. Till last month I was in Birth control pills (Novelon) and had my periods twice in ten days interval. I had my last period on 25th of September. Last Saturday I did my pregnancy test and it came positive. Next day again I did again it came positive. However to make sure exact date of pregnancy I did Beta Hcg and Progesterone test. Today I got the results. Beta Hcg-22113 and Progesterone-25. As per result I am pregnant. Also I am having a belly pain specially upper belly. couple of lose motions I had earlier and Nausea tiredness. My question is that it is showing I am pregnant for 4-5 weeks which is same to the last date of my period how can an egg get fertilised when I was having period. My Doctor asked me to do usg afer 15th October.