I'm so confused, this is driving me crazy!

So in April my AF lasted 7 days. This is very rare for me because my AF is always 5 days long. Then in May I was 6 days late but AF showed up and lasted 16 days!!!! I had severe bheavy bleeding and clotting, again this was completely irregular for me. So I called my dr and they completed an ultrasound and ran blood tests and found nothing. They told me it was just a fluke and that I just happened to be having a heavy period. So it's been 11 days since my last AF stopped and I know that I am ovulating because my cervix is soft and I've had lots of cervical fluid so my husband and I did the baby dance twice this week. Then suddenly today AF showed up super heavy! I shouldn't be ready for another period for 2 weeks, I don't understand what is happening. I don't even wanna consider it a period because it's so heavy it's almost like an injury although I can't figure out how I would be injured. Also I've had no pain at all, no cramping or anything. Any advice ladies? I've Googled everything and I'm not finding any real answers. I feel like I've gone crazy 😦