Well, you should see a gynecologist to see if there’s some sort on infection.
It doesn’t have to be an STD but fungus that usually occurs when the levels of good bacteria decline in the vagina.
Yeast overgrowth is likely to cause burning during intercourse. Yeast could over grow due to excessive douching, using birth control pills, antibiotics, etc
You could have caught an infection if you had some cuts inside vaginal walls made my fingers and long nails. If the infection’s bacterial, it could be easily passed to your partner.
It would be best if you saw a doc and tried to take care of the problem.
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