I suffer from vaginismus. but yesterday when my bf slowly entered me, shooting pain occurred in my lower back and we had to stop. what does that mean?

See GYN: You need to talk to your gyn about this condition. What this means is that you have too much tightening from the spasm preventing the entry. This is not my specialty , just common sense.

Vaginismus: Is a multi-faceted disease. It can be physical--like needing to use a good lube (like eros), for comfort. There are also many problems that originate in the brain and psyche-religious issues that are unresolved can cause problems. I'd recommend a sex therapist to see if they can give you some tools to help!