Here is the problem. I have an irregular cycle but the thing is i havent had one in 5 months. After the first month i took a pregnancy test and it was negative.So i thought it was just my period but when i still hadnt had one goin on the forth month and had been having all these pregnancy symptoms like sore nipples heaviness of the breast,being really tired all the time weight gain eating funny,feet swelling,nauseau,i took two more test back to back just to make sure one was negative and one was positive. so a few weeks later i went to a pregnanc clinic they took another urine test and it was negative and they did an ultrasound it was negative but they want me to come back in two weeks if i still didnt have a period. Still no period!!!!! what do you think this is?