Bleeding during and after sexual intercourse

Hello doctors.
I’m a 27 y/o woman. I had protected sex on my day 9 of cycle. I’ve stopped bleeding for my period on my day 6, which is the usual cycle for me.
But during the penetration, I bled. It’s the first. I NEVER bleed during or after sex before. And it’s kinda thick as the spot on the towel soaked the comforter underneath too.
To note: It was my first sex after 7 months.

So… I washed up, peed, thinking it was just spotting.
After that… we had sex, again. And I bled, again. This is where I’m getting concerned.

So… my concerns are…

1. is it possible to experience spotting twice in a row? First and second penetration, concurrently?
2. is it possible to continue menstruating after penetration? Considering it’s still around my cycle, more or so.
3. is the guy expose to std from the period blood even when he had his condom on?

I’ve tried googling but the search results were all similar: spotting due to vaginal injury, and worse, early symptoms for cancer. Which doesn’t help.

I’m so sorry for the super lengthy message. I really hope I can get glimpses of insights from you guys

Thank you so much