Should sex hurt?

I’ve lost my virginity, I had sex 3x now and every time I’ve had sex it literally hurts. First time hurted which was normal. Second time hurted me really bad I didn’t even wanna do it a second time. Me and my partner were in missionary mind you we haven’t had sex in about 5 months so it was gonna hurt ofc and when he tried to put it in it hurted. It felt like I was a virgin again. Like something was poking me. Literally. And in doggystyle I was literally almost crying it felt like something was ripping not in a good way. My partner is pretty large so could that be an issue? And we tried it a third time it didn’t hurt as bad, but it definitely still hurt. I went to go get tested for STI’s & etc and when my doctor literally put her fingers up there it hurted as well. When I put in tampons it hurts sometimes. Is this normal?