well, i can tell you from experience that pregnancy tests are not at all accurate, but only working on my experience, thats my opionion.
i went to the store and bought two pregnancy tests, came home, and took them both. i followed all the directions to a T, and negative was the response on both tests. ive always had abnormal periods so i didnt think too much of it until the naseau started. went to the doc and found out i was 3 months along!!!!
yea, go to the doc, they will know for sure, dont bother wasting money on pregnancy tests.