Hi, I am 29 years old. Had a blighted ovum last year. This month I didnt get my periods, they were due on the 4 -5 th Feb and I feel constipated all the time, lower abdomen cramps and heaviness and a yellowish which dis charge.Have lower back pains, and had headached last week. Also I have been feeling very thirsty lately. Took two HPT both negative. Still are there chances ? coz I didint get my pd till now.