Why does my vagina do this?

Everytime I pleasure myself after about 5minutes my vagina becomes really sore and very dry and I experience this on my fingers
Also my vagina doesn’t stretch more than my two fingers, I’m scared that I might have condition of some kind.

yeast infection

It’s might be vaginismus. That’s why your vulva won’t stretch much. for the dryness, I recommend to go check it up because it might be some ph imbalance or bacterial infection