It’s aways possible that you’re pregnant, but it’s been TWO DAYS, so I say it’s highly unlikely and you’re worrying too much. You can’t even take a pregnancy test yet. I’m sure you’re just ovulating, that’s what it sounds like, but if you’re that concerned, take a home pregnancy test in a few days to see.
On a side note, you should not have had so much pain in the following days! You’re usually sore the next day or so, but that’s it. He was definitely way too rough with you, not even for a first timer – for anyone! If you were in pain when you walked for DAYS after…that’s not normal. Especially when you already had your hymen torn so it’s purely a muscular issue where you’d be sore because the walls of your vaginal channel had to stretch in a way they never have before.
This all comes down to the fact that you should have experience very little discomfort, not major discomfort like you’re describing. I don’t know what it is you guys did, but I really advise you take it easier if you have sex with him again.