Intercourse after giving birth via CS

Hello. Just want to ask something po. My baby is now one month old and I delivered it via Ceasarian Section. My husband asked me if it's safe to have sex and i answered him that I don't know. I know some of you will think that "grabe di makapag antay" But yes we did that thing again. It feels like it was my first time again :( It hurts but the pain eventually fades din. Now, I'm bleeding. I'm afraid to go to my OB and tell her about what happened :( Do you guys think that I might get a problem? Please respect :( Thank you