Hi there,
If that was the only time through out your cycle that you had unprotected sex, it is highly unlikely that you will be pregnant. Depending on your cycle length, with the typical length being 28 days, you would have ovulated on day 14 (which day 1 being the first day of your period.). In order to conceive, you needed to have sex on or around the date of ovulation. This window is a small one, somewhere between 12-36 hours for ovulation and conception. Note however, sperm can live from 1-5 days in the fallopian tubes waiting to meet an egg that has yet to be released. There are cases where conditions allowed sperm to live up to 7 days. But, if you are saying you had sex 2 days before your period came, it isn't likely that you conceived. Now, if for some bizarre reason, you have the shortest Luteal phase of only 2 days when normally it is around 14 days (this is the time after you ovulate until you get your period) and you did miraculously conceive, you would have to wait a minimum of 14 days to test accurately, or 14 days past ovulation. But knowing that you had your period, and tested negative, it is most unlikely you are pregnant. You should definitely research a bit on fertility so that you can understand your cycle, and not live in fear that you are pregnant. See this site about negative testing and odds of pregnancy: http://babymed.com/faq/Content.aspx?14684 Also, make sure you are using adequate birth control. The statistics do say however, not using any protection bares a 35% chance of getting pregnant each month. And at this age, you are in your most fertile period. If you aren't looking to become pregnant, I wouldn't take the chance of not using protection. It only takes one time. If you had sex any other time aside from the 2 days before this particular period, you may have to retest in about 2 weeks just to be certain you are not pregnant - because implantation of a conceived egg can cause bleeding known as "implantation bleeding". If you have any concerns after testing because it comes back negative, ask your doctor for a beta hCG blood test. That will more definitively tell you if you have any pregnancy hormone in your system.
In addition to anything I have mentioned, please keep in mind, that while I or others may have extensive knowledge in many areas, you should always seek professional medical advice from your own physician, as it pertains to medical conditions or concerns.
Good luck, and if you have any other questions that I can help you with, please feel free to message me directly.
Sincerely,
Sandi (Dragon1973)
MedHelp Down syndrome Community Leader
& Ds Group Forum Founder/Moderator
Hhhmmm it could be possible that you may be having a chemical pregnancy but with the painful cramps I am wondering if maybe you have a cyst on one of your ovaries. I would call your MD if I were you so that they could do more testing. Good luck with everything.
12 days but normally 14 days after the last time you had sex the test will be accurate =) Good luck!
That being said, you're most likely not pregnant, smexicangirl. You ovulate roughly 14 days before your period (the time between ovulation and your period is the luteal phase).