If you are pregnant you might be able to get a positive on a pregnancy test at this point, but you also could be spotting and aching because of your period. A women ovulates anywhere from 12-16 days before her period. If you count your cycles from the first day of your period until the last day of your next period that is the cycle length. If you know that you have a period every 28 days, then you could take a test as soon as a few days before your period depending on what test you take.I would just wait and see if you start your period within the next week. It is normal to spot before your period and is linked to a decrease in Progesterone in your body most of the time. Let us know what happens!!!