Serious Vaginal Talk

So A Few Weeks Ago (1-2 Weeks) I Cut Myself Inside My Vagina From Shaving. It Was A Minor Cut. I Didn’t Know I Had A Cut Until Me And My Boyfriend Had Sex And It Began To Sting Really Badly. So About 2 Days Ago We Had Sex And It Began To Burn Really Badly And Ever Since Then I’ve Been Having Vaginal Discomfort. Is It Maybe Because Of The Cut And It Didn’t Heal ? Or Could It Be From Something Else ?