It sounds like you have an infected gland. You need to see a doctor for that.
Proper diagnosis is the most important thing. There is even the possibility that one infection versus another needs a totally different treatment protocol, different antibiotics for a different length of time, etc. You can't do this yourself. See your doctor. You'd be amazed by the things they see every moment of the day.
Hello and welcome. Sweetie, don't be embarrassed to go to the doctor. THIS is what they do! You are like lots of women they see with issues in that area and it is no big deal to them. Never feel embarrassed at the doctors!!
So, sounds like you have an infection. ??? But swollen, pain, smell are all symptoms of that. Infections need treatment. Antibiotics are important. So, you must go to your doctor and see if you have an infection and need treatment. No big deal. Bet the doctor saw two other people before you that day that had infections.
Have you had sex recently by the way?