I'm a lesbian and uses toys when we intercourse, we've been doing it for years now but lately my partner says every time I penetrate her the inside of her vagina hurts. I have been trying to get her to see a gynecologist but doesn't want to go as she is embarrassed, is there any reason for me to worry?

Yes it can be many things, some minor, other serious.

She has never been to doctor for check ups ?
Get there an appointment and make her go

She's got thrush Thrush, vaginal - Symptoms - NHS Choices (http://www.nhs.uk/Conditions/Thrush/Pages/Symptoms.aspx)

Jazzas, how are you able to diagnose without knowing any of the symptoms, except for pain? Physicians can't do that.

Are you a Physician?

It is dangerous and foolish to diagnose over the Internet - you could be making "light" of a serious condition.

Thanks for the insight.. I still can't make her go.. she's embarrassed she says..

Ask her if dying from Cervical cancer would be more embarrassing.

Because she NEEDS to go to a gynecologist annually... and trust me they HAVE heard far crazier things. There is nothing unusual or embarrassing about her seeing a doctor and asking about this.