It might not be enough to stop the friction. Try oil/lube
I have this same problem. And everyone tells me Its cause I'm dry but I have lots of discharge ? How can I be dry but discharge all day long
I heard that some women don't get as wet once they are pregnant and to use lube. Not to be too vulgar or anything. But I kinda had a similar thing and I think it was because of that. Hope you get to feeling better!
Put cold water bottle... ice. Frozen peas down there
I would go to hospital or contact my doctor,
It may be an infection