Vulva sore after sex one side

I get this on and off but my vulva is sometimes sore only ever on one side after sex. It will last for a few days weeks and then it will go. but prior to this I did have what looks like a small blister that has gone but now I've just got this sore patch. Any advice that can stop somebody worrying who suffers with health anxiety. Could it be lichen sclerosus? Is it an after thing of genital herpes?

Thanks 😔

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