6 DPO - would love some input :)

I miscarried in June at 13 weeks. I remember when I got pregnant, I was just waiting and waiting for my period to come, because I had all the usual signs. I had implantation bleeding on my birthday, which I thought it was just my period coming. After being 2 weeks late, I found out I was about 6 weeks along. 
I believe I ovulated the day after thanksgiving, which was exactly 2 weeks before my period is supposed to come. I have extremely regular periods and I usually feel when I ovulate because I get crampy. 
What I'm wondering is, since I've already been pregnant before, will my body know sooner when I'm pregnant again? My period is due in 8 days and I feel how I normally feel before I get my period. Crampy and super irritable lol. I can't even look at my bf without getting angry at him 😂
We had sex both days before I ovulated, and the day after I ovulated. I'm praying there's a good chance I'll become pregnant! All I want is a healthy baby. My due date was December 15th, so it would make me very happy to find out I'm pregnant again.