This is driving me insane.... I have ovulated around the 18th then my levels dropped off, and I…

This is driving me insane.... I have ovulated around the 18th then my levels dropped off, and I started again about a week later but every day my tests are positive as F. But I have negative pregnancy tests, all of them... If I ovulated on the 18th or 19th then I'm on 11dpo pretty much. My breasts are tender for the first time ever and I'm very bloated in my upper and lower tummy