Re: girlfriend has sticky/smelly stuff
What type of smell does it have? If it's a fishy odor, than I'd say possibly. It also depends on where she is on her ovulation cycle, since vaginal discharge changes in the cycle to improve chances of pregnancy, since the vagina is typically an inhospitipal place for sperm, so the discharge changes to help the sperm survive. I would say for her to head to her GYN to get checked out for BV or a yeast infection. Also it could be your ejaculate that causes the smell, because ejaculate is not ordor free, so when mixed with vaginal secretions, it usually creates a strong odor.
If the pain is caused from lack of arousal, then more forplay would help that. Again, she should see her doctor and will get it figured out. Good Luck