I am 18 years old and about three weeks ago I had been fingered and performed oral sex on me by a guy. About 3 days ago I felt pain while urinating so I went to the doctors and I was diagnosed with UTI and they gave me medicine. I feel all better now and it doesnt hurt, but today i noticed that my outside of my labia were red and swollen. They don't really itch at all. Is that possible that that is just a symptom of the UTI i have/had?
It sounds like you have a case of vulvovaginitis, or inflammation of vagina and external genitals.
Vulvitis can cause the labia to look red and somewhat swollen, and cause pain on urination.
Try to change the soap you use for your intimate hygiene and use the medicine you were prescribed.