NEED NEED NEED HELP !!! ASAP!

Everytime I have sex with my boyfriend I bleed after . The last time I just had come off my cycle so I know it wasn't my cycle but this time I think he went to deep and now my stomach is killing me and I'm bleeding like I'm on my cycle . I'm scared . WebMd is scaring me and I'm just freaking scared man. Idk what to do at all . Should I go to the doctor should I stop having sex period lol? Like idk ...