I recently had sex last night.. the forplay was pretty rough then leading to sex. I then noticed this morning that my left vagina lip was swollen.. it hurts pretty bad, Its not anything to o with latex we didn't use a condom.. can someone help me with why this happened?

Exactly because the foreplay was vigorous. There is nothing you can do that won't feel really weird (in that area), so just let the swelling go down. If you can stand it, put cold compresses on it (thats why it will feel wierd).

Thxs