My friend got Chlamydia and got treated for it. Then about two months later it came back again. Do you think the medication didn't work or do you think he cheated on his girlfriend?

I'm in a monogamous relationship. can you still get Chlamydia by having anal sex then go back to vaginal sex without washing in between?

Lately I've noticed at the front of the opening of my vulva, there is a round, gland-like thing that protrudes slightly from the opening. I didn't really think much of it at first, but it's really uncomfortable to touch, which makes sex very uncomfortable. It also seems to swell slightly when agitated, such as after intercourse. What is this thing? And why is it all of a sudden in my way?

Should a condom be used when giving a blow job?

If I had sex about 1 month ago and used no protection and was on my period would signs of a serious diseases that could be dangerous, would it show up in that time?

What happens if you don't protect yourself when you are having sex?

I have many small red dots / spots on the tip of the penis. It pains during masturbating and during bathing in warm water. These red spots have come only recently, probably, some days after unsafe sex with a guy!
What could this be!
Is there any medicine that I can take.