painful sex

My girlfriend and I recently had a child about 8 months ago and have enjoyed sex since then very regularly. Recently she has been complaing during intercourse of a slight pain on the left side of her vagina wall. She explains it as I'm rubbing her the wrong way or sandpaper only on that side. Were confused because she has been able to get aroused normally and without any problem, but once we "get in the groove" she experiences this sensation. Before this often during sex she would express her pain and ask to switch positions and wed continue from there. Its becoming very frustrating for both of us as its leaving us both unsatisfied at the end . please help 

Your girlfriend should really go to her Doctor who will probably refer her to Gynae to get checked out in the first instance, make sure there's nothing medical going on that needs attention. It is likely that things are getting worse because she will be tensing herself up, probably unconsciously because she is expecting it to be painful, I think this is called secondary vaginismus. But make an appointment and get things checked.

As Hazel says - doctor - gynaecologist - eaxamination - treatment.

Don't give up

Thank you she has an appointment today. I will reply with the results. I greatly appreciate it.