Please someone help me!?

I am late for my period,today is day 7. I was due for it may 1st. I got my hubby to check my cervix and he said he had to reach quite far to feel it,he said he feels no hole or anything in it. But he said it was hard. Now when I check I fell it sort of squishy on top and I feel the slit in it,I have had 2 l births and a c section. My tubes are tied with clips. I have been feeling a tad queasy the past 2 days. I have taken 3 pregnancy tests all negative. I figured if I ovulated late last month it would be here today,but nope.