I had sex july 5 and had a period on july 21. My period was unusual and i fwlt pregnant. I took two tests and they both came back negative and i left it alone. Then i started to feel very fatigued, irritated, i have dark urine, i have bloating in my lower abdomen, and i didnot get my august period. I also do not ovulate the same time each month. Could i be pregnant?