We have been trying for about 4 months now and everytime I take the test it says "not pregnant" and my last period was on July 5th and lasted 6 days. It was always 28 days and lasted 7 days long.... I was said to have ovulated on the 24th and so we had sex on the 13th, 15th, 17th, 19th, 20-22 and after that we continued to have sex and we had sex everyday for a week and then 3 days ago we did it doggy style.... Ever since we had sex after my period ended, I've been feeling very nauseous lately, tired, sore breasts, peeing more often