Could I be pregnant

So I just started my placebo pill week. I’m on the pill and I take it perfectly. I’ve had sex with my boyfriend about 4 times this past month. We use condoms also, everytime we have sex and he pulls out before finishing. I have checked the condom everytime after we had sex with water and each time, no water leaked out of the condom. Anyways, my period has been pretty regular in the past but last month I had to up my dosage of pill due to a lot of random spotting. So I didn’t even technically get a period last month. Anyways, my period is due sometime this week, I just don’t know when. I took a test this morning because I’m paranoid and it was negative. Is that accurate or could I be pregnant? I’m not trying to get pregnant