Thanks for using the forum.
In this situation I would recommend you speak with your doctor. Without an examination, it is not possible to tell what is causing your swelling and irritation. You could possibly have an infection, or ingrown hair. Skin is more sensitive during pregnancy, it could even be as simple as irritation from soap or lotion. Make sure to use mild, unscented soap to prevent any further irritation.
Hope this helps. Feel better and congratulations on your pregnancy!
Cathy
Forgot to say I'm 9weeks 5 dsys along.