So confused?!?

So I did my 4th round of clomid and at 6dpo I got a clear bfp on 2 different brand tests so I tested 2 days later to see if the line was getting darker and it was a bfn. So I tested again yesterday at 11dpo and it was positive again on 2 different brand tests and then today I tested again and bfn I have all the pregnancy symptoms and all the tests were taken with fmu. I’m just so confused has anyone experienced anything like this and gone on to have a healthy baby?