Have you ever just...known?

The last time I was pregnant, I just knew. I didn't need a test to confirm it, I knew. From the get go. Almost from the day of implantation. I know, it sounds absolutely insane. But... I KNEW. I wasn't trying to conceive, I was on the pill and also told I most likely couldn't have children. I ended up miscarrying that pregnancy.

Fast forward a few months.... and I feel like it's happened again. Still, on birth control and using other protective methods. Still have these "health concerns" which again, I've been told for 15 years now that they would prevent me from being able to get pregnant.

My period is due Saturday, but I'm 98% sure it's not going to happen. I don't want to test yet, because then it's.... real? I'm not ready for another go at this. I'm literally trying to deal with the trauma of the last pregnancy/miscarriage/issues that came afterward.

Has anyone else ever just KNOWN? Like literally from the get go?