Make sure you have contraception organised before having sex.
I had 4th degree tearing and plenty of stitches.
Take it slow and use lube. Lower the expectations of having sex and instead just try to get to different stages of sex. For example, kissing and touching each other the first time, penetration the next time, brief gentle fucking the next, and keep building up to the full main event as you’re comfortable with. Let him touch your genitals. See how that feels and if you’re comfortable with that. If it hurts, stop. Make sure he understands beforehand that if you stay stop he really does have to stop immediately.
Next time maybe try to get to penetration. You might not get to actual sex yet. Try to be relaxed and turned on, and use lube. Ask him to enter gently and slowly. I think this part took a few minutes the first time for me and DH. If it hurts, stop. It might feel uncomfortable because nerves have been cut and are trying to heal, there will be some scar tissue and that scar tissue hasn’t been stretched yet, and your vagina has been through a rough experience. I definitely felt physically uncomfortable for a few months with different nerve sensations down there but not pain.
You might need to try different positions to find the most comfortable one. For me doggy position was very uncomfortable for about two years. We’d try it every so often to see if it felt good again for me and stop when it didn’t. I’d had a fistula (hole) between my vaginal wall and rectum that had to be stitched up. Doggy position meant that the scar was rubbed really badly by DH’s penis. One day it finally felt good again.
Anyway, make sure your DH doesn’t think that you’ll be up for sudden penetration and him banging your brains out with hard fast fucking. We worked up to getting back to normal sex. Thrusting felt weird at first and was a bit uncomfortable even with DH going gently and slowly. We got there after repeated attempts, going slowly and allowing my body to continue healing. It honestly took about 12 months before sex felt mostly normal again for me. Something like doggy position took about 2-3 years.
I hope that it goes well for you.