Hey guys. Sorry to hear about your problem.
My first thought was a vaginal dilator so I did a little research online and found this term...
Vaginismus - vaginal tightness causing discomfort, burning, pain, penetration problems, or complete inability to have intercourse.
Here's a more detailed explanation:
What is vaginismus? - Vaginismus.comI don't know if this is what's causing your issue or not but I would go see your doctor to find out and make sure there's nothing else going on.
Many people are uncomfortable talking to their doctor about sexual issue - but that's what they're there for. Especially for something like this. Go see your doctor.