I'm Seventeen And I Had Sex With My Boyfriend Almost

I'm seventeen and I had sex with my boyfriend almost a week ago (this isn't our first time) and after we..did it. I had tender breast I couldn't even touch them they hurt that bad and he didn't touch them during the intercourse I also have had insanely sore sides to the point I have to hold my sides when going to the washroom because the pain is so bad , what is wrong..