Red-rash like and itchiness of the vaginal area.

Hi 11x it sounds like a yeast infection to me. OR a reaction to soap/cleansers, scents etc. Try to rinse with just water for a couple of days and see if that works, don't take baths, just showers. If it is still itchy, then get some monistat - take the 7 day kind. If after that it still is there I would go on an STD website and look at different pictures. It doesn't sound like an STD. More like a reaction of sorts. But rule out the lessers before jumping into the majors OK? Good luck and health

It does sound like a reaction to something. Have you changed your bath soap or laundry supplies? Even a change in panty fabric can cause irritation, cotton crotches are always best. Do you go commando? The rubbing of your jeans can also create an irritation.
If you had a yeast infection, you would also have a slight discharge with a somewhat "yeasty smell" to it along with a burning sensation when you pee. Your vaginal area would be very itchy around your vulva. It's an itch that feels good while your scratching it but hurts when you stop. What is your shaveing method?
Vagisil offers a cream that you apply to your external area that controls the itch, but don't mask it, try to find out what's causing it.
Vagisil also puts out a test kit that allows you to check for possible infection. You just swab your vaginal area with the test strip that is provided and compare it to the information that is also provided. It's like checking your swimming pool water, same scenario.