Hi,
During pregnancy, your body's blood volume rises by about 50 percent, with much of that fluid routed to your uterus to nurture your growing fetus. As a result, vaginal tissue becomes engorged with blood, leaving some women feeling a bit swollen and tender.
The tissue in your vaginal walls fills with blood and so do the external genitalia, this effect will be more pronounced as pregnancy progresses. At 9 month's time it will be at maximum capacity.
As your baby grows, pressure from your uterus slows blood flow in your lower body, with the potential to distend veins anywhere below the waist, including your groin. Like varicose veins on your legs, varicosities in your vulva can cause pressure and throbbing.
This will resolv eafter the delivery.
ref:http://www.melodywarnick.com/clips/your_belowthebelt_guide_to_pre.html
ok the swelling went down after applying some vaginal moistureizer, but now it itches a little up by my vulva.
I have the same problem at 6 months. Its very very extremely swollen and itchy, just one side. Can be painful if touched Is it normal? My OBGYN made out as if it was not.