Are these symptoms?

Alli

I had my birth control taken out 3 weeks ago (nexplanon) I had unprotected sex during ovulation 2 weeks ago(a lot of unprotected sex). My period is supposed to start tomorrow. All day today my stomach was aching and I had no appetite. I had some cramps earlier that felt kinda like period cramps. I have been super irritable. And my nipples are so sore, like I couldn’t even wear a padded bra today.