About 8 days ago, a guy and I messed around some. We did oral sex and moved a little toward sex. We did not have full intercourse as I did not want to do that. Before I made that decision. His penis was inside me (no condom) for about 10 seconds. He did not ejaculate at all while we were together. Then I decided I did not want to do it and he respectfully understood. I had to double up on my birth control pills that day and the day before as I had missed some. I also have PCOS which I have had for years and know effects fertility. I have not received a period in about 4-5 years. What are my risks of being pregnant under the circumstances?