so I fad sex August forth he cam in my three times but my ovulation period(the time when out of that month I'm most like to be pregnant) was 8/10.. and my period was suppose to 8/28 and it never cam I took a first resopnse pregancy test the day before my missed period and I came bac negative do I waited and waited and my period never came so itook a test 10 days after my missed period and the test still came bac negative I was throwing up a lot in the beginig and I was very aggitated allt the time my stomach is getting bigger but itz not getting hard I've ehad slight cramps you can just say most of the symptoms of pregnancy I've had them.. but still I keep getting false test and no period I'm stressing out over this and I need to knoow what to do

The best thing to do at this point is call your doctor and ask for a blood test to confirm it.

They are much more accurate than home pregnancy tests. Either way, if you're late, you should probably make sure your doctor knows.