What Causes Swelling And Itching In The Vagina?

Hi! I have not been sexually active in months, but recently, I decided to be active with a guy that I have been dating for a while. We have been intimate twice, both times protection was used, but I have noticed that I now am irritated in my vaginal area with a slight amount of blood and a foul odor. I m not concerned about an STD, but I am worried about a yeast infection and possibly UTI due to having frequent urination with only a scant amount of urine. My ob-gyn doctor told me before that I am highly sensitive to certain things including certain condoms. I m concerned and wondering what to do. I do have some itching and burning on urination or even wiping. My clitoris is swollen and irritated as well.