Reason for vaginal pain sometimes?

Hi, guys! I'm 21 years old. I started having vaginal pain several months ago. It is not during sex, it happens from time to time while I am sitting, for example. The pain appears for 2 seconds probably and then goes away. I went to several gynecologists. It turned out I have some infection and I had to take some antibiotics and vaginal tablets. The gynecologist examined me with ultrasound and said everything seems fine.

I wonder what could be the reason for my pain? It it possible to happen due to stomach problems or due to kidney stones?

Thank you guys for reading my post ❤

Reason for vaginal pain sometimes?
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