Hello,
Welcome to the ehealthforum and I am really glad to help you out.
Your concern is regarding the status of your pregnancy. Apparently, you had your last menstrual periods on November 12th, so any unprotected intercourse after this date can cause pregnancy.
For confirming the status of pregnancy by urine for pregnancy test (UPT), the most accurate way to test for pregnancy is to wait until after your period is due. The first appearance of the pregnancy hormone, HCG, due to implantation occurs 6-12 days after ovulation. It can also be tested 9 or 10 days past ovulation with a sensitive ( 20 - 25 mIU ) pregnancy test. Aimstrip pregnancy test gives good results and can detect 20 mIU of HCG. I sincerely suggest that you do a urine for pregnancy test and if the test comes back negative, then please get your serum HCG levels estimated.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are advised to consult your doctor. I sincerely hope that helps. Take care.