After I had sex for the first time on 28 March my most fertile days. My stomach is getting bigger it seems like a pregnant one completely swelled and rounded but my urine test showed negative .in may I have done beta hcg also it shows negative. Then now in July I had two ultrasounds with a gap of week they were also negative. My periods come every month but they last for 1 and a half day only whereas before intercourse I always had periods for 4-5 days .my stomach is too bulging which makes me worry and I always feel pulse in it. Please suggest me some medicine to regulate my periods I had taken one bottle of himalaya evecare but no effect was seen .is m pregnant or a hormonal imbalance please help me I don't want to be pregnant. Suggest me medicine. Earlier I was having flat stomach.