My private stings, one of my lips are a bit swollen, and there is tiny irritated bumps on my lips

What might you have done to cause it? Have you been rubbing it against something. Has someone been rubbing it for you? Have you used a different detergent to wash your underwear or bought different underwear? Maybe the detergent didn't get rinsed out well.

For relief you could use some hydrocortisone cream.