Am I out

I had a miscarriage on July 30th. Ovulation hasn’t been happening every month since but this month using ovulation tests we Baby danced day before on and after ovulation. I’m 3 days away from my period but I tested this morning and definitely negative. My boobs were killing me yesterday which doesn’t normally happen for my period. Had lower back pain too I think I have convinced myself these are pregnancy symptoms. Has anyone tested negative then positive on due date?