I have been having strong abdominal pains for over a week now. Last night I went to the ER, they did blood & urine tests which all came back normal. Honestly, I feel pregnant. I've been feeling really strong movements in my stomach most of the day, and I'm not sure if I'm late on my period yet. I haven't gained any weight according to the scale, but my stomach looks like it got bigger too. I've taken 4 pregnancy tests on my own, that came back negative. And had negative results at the ER. Could I still be pregnant? If not, what is this caused from?