My cycle is 11 days late. I've taken 5 pregnancy tests and they all came back negative. What is going on with my body? I normally have my cycle every 23 days. The last time I had intercourse was Oct. 2, 2016. I had my cycle Oct. 10-16. That was 20 days from the previous one. Then I had my next cycle Nov. 7-13, which was 22 days after the last one. Then 18 days later, I had a cycle from Dec. 1-7. I should have started my cycle Dec. 29, 2016 - Jan 4, 2017, but I still haven't started. During the week I should have started, I did experience cramps in the morning, which made me feel like I might start, but I never did. What could possibly be going on with my body?