Talk to Gynecologist on Vaginismus

Hello! I am 22 years old. I am not a virgin, but my partner can’t insert a penis into my vagina. However he can insert two fingers, and it’s okay. I am relaxed, we used lubricant, tried different positions, but still it doesn’t work. I have no complaints outside of sexual intercourse, and there was no such problem with my previous partner. I wonder, if it could be vaginismus? What can I do? Thank you.