Thread: Late period, negative pregnancy tests

My period comes on day 24 - 26 (I have had it start on day 28 a couples times last year) but I am now on day 30. I've never had a period start past day 28, and even then it's been no later then day 26 for a year now. I have taken 3 pregnancy tests, the first test and most recent one I have taken were negative, but the second one I took I thought had a VERY faint second pink line (not sure if I was just seeing things). I had my usual symptoms (mild cramping, breast tenderness) of my period starting around day 22, but my period has yet to start and those symptoms have now gone away. I did have unprotected sex where my partner did come inside me several times in the past month. I have gained about 10 lbs in the past two months, haven't had any more stress then usual recently. I also recently starting having heartburn every day which I've never had an issue with, as well as a little bit of nausea which I get every once in a while. If anyone can give me a little advice or information that would be much appreciated, I have tried researching but haven't come across anything that put me at ease. Thanks.