I’m not sure if I’m overreacting 😳

I was suppose to start my period three days ago and haven’t started yet. I got tender nipples and I haven’t gotten them that tender in a long while as a period symptom. My SO and I have sex every weekend (LDR) we’re always very safe with sex. Keep everything clean with condoms and he even pulls out when he’s finishing and washes his hands before touching me everytime after he takes off a condom. I’m not on birth control and have medical history of having to take steroids as a baby for medical reasons which my doctor said would affect me being able to get pregnant. (Never got that confirmed when I got older, I’m 19 rn) do you guys think I should worry myself? Do you guys think I’m pregnant?