Suggestions..

My af is due on the 29th I am having mild cramps and watery cm... According to ff I ovulated on the 7th today is my cd 28.. I have taken many hcg tests and all neg. However with my 7 and 3 year old it was the same I only knew through blood testing... I am urinating much more than usual... My temps are also weird for me... Please leave your input... My cervix is high hard and closed...