Does anyone know what this is?

alright so i never felt any pain, itching, burning, or rash. i havent experienced any flu like symptoms and this hasnt happened anywhere else. i just woke up one morning and had 3 bumps on the shaft of my penis. They looked like acne. they were firm bumps on the outside. when i popped them the fluid looked just like acne stuff.

However, one of them kept filling back up and eventually it was just pus that came out. the skin around it swelled up and is firm but no rash. there was still no pain only when you touched it and press on it does it slightly hurt.

i assumed it was just an infected ingrown hair or something. but the last couple days it has turned into more of a pit. still with pus. the other bumps are already mostly gone but this one is still an open sore and the skin around it is still firm and swollen. just around the crater pit the skin is turning a darker purple almost.

ive googled and looked at a lot of stuff but it all kinda seems the same so im not sure exactly what it could be. im not super sexually active but this did appear a few days after i recived oral sex. online it kinda looks like herpes, syphilis, or it could be something else entirely.

so im just seeing if anyone knows what this is or has had this.

just a wrap up of everything:

its been about a week
3 bumps - firm and filled with acne oils
no burning, itching, pain, flu symptoms
swollen skin, firm to touch
1 bump - filled with pus and crater like
other bumps are healing
no other bumps or rashes

i will also attach photos.

*UPDATE

So it only kept getting worse so i went to the urgent care. they told me its not herpes but some type of infection. they gave me antibiotics and had me come back for a blood test. The doctor seemed pretty sure its probably syphilis.

looks like syphilis… thats a chancre usually common in syphilis.