No baby will be fine, just don't do anything that makes you uncomfortable
Don't let him dive all the way in so he's not hitting your cervix. You will and they baby will be just fine. Take it slow until you get comfortable with them idea. Enjoy
No it doesn't hurt the baby, I have short cervix,which is fine. But with my son my first pregnancy from having sex, I bled for a few hours, I went to my doctor I didn't know what was wrong, they then asked about sex if I had sex, so they suggested not having sex, it was weird to be told that, but we did lay off the sex for a while. But in your condition, your fine. Don't worry you had two other children, and it didn't effect you, best of luck to you, and congrats