Vagina burn

I was getting fingered by my boyfriend and it was all good but then he stopped and we did some more foreplay, then he started fingering me again and it was burning. Is that bad? He fingered me yesterday too and it was almost four fingers and I was pretty sore for like an hour or two hour after. Is it because of yesterday that I was burning today? Can some please explain... we didn’t have sex today bcus I was not enjoying it bcus it was burning. We tried to have sex and it burned a lot less but with fingering it was just burning a lot....