You may have a yeast or bacterial infection. Even if he has no STDs or possibilities of STDs, if he doesn't practice amazing hygiene, and even if he does, he's taking something that is covered in natural, normal bacterial and putting it into a very sensitive area. Infections are a real possibility after lots of sex. However, it's also possible the swelling and burning is from just rough sex. If you don't use/have enough lubrication you basically get a rug burn inside your vagina. And it sounds more pleasant than it feels.
Blood can easily happen if he's large and going in deeper than previous. Even after you've been together for a while it's possible that you can still stretch or have vaginal tearing. Also it's a possibility after rough sex to have some vaginal tearing. Usually it is more along the lines of spotting, so unless it was a ton of blood I wouldn't freak out about it.
Right no you need to take a break off of sex. Let your vagina breath. If the swelling and pain goes away it was caused from rough sex- and you may want to look into good lubricants for the future. If it doesn't go away within a day or two you will need to see a doctor and make sure you don't have an infection. Even after a day or two it can still be caused from rough sex, so still try not to worry too much. If you notice any abnormal discharge, it starts to burn when you pee, you get high fever, or back pain you need to see a dr asap because it's likely it's an infection.
If you are in pain of feel sick you should see a doctor. Rough sex is nice one in a while but definitivly not twice a day! Even if you dont go see a doctor I think you should take some time off and next time dont forget to go easy and use a lot of lubrifications.