Hi, I got married 4 months back. My first two periods came normal after marriage, but 2 days late which I assumed normal. The third cycle was with scanty flow with no pains and lasted for 10 days. This month they are 11 days late. I had the same symptoms as pregnancy like nausea, a little back ache, drowsiness and quite a lot of gas. Also I felt like vomiting but I couldn't. The same cramps were there. I also went through two pregnancy tests on the 5th delayed day of menses. hCG and home pregnancy tests. Both showed up with negative results. After 11 days I got the menses. I am worried if there is something wrong with my cycles or my reproductive system? Please respond sooner.