I've had a similar experience before, though it wasn't sleep paralysis.
I suffer from hypnopompic hallucinations, or hallucinations that occur upon waking up. I guess they only happen in about 10-12% of people, so
whenever I try to explain these things everyone just looks at me like I'm crazy. I promise I'm not!
The one episode I remember similar to yours...I was sleeping with my then-boyfriend. Woke up suddenly to see what looked like someone in a bear
costume staring down at me, sort of next to my hip on the side of my bed. Not just any bear costume though, that wouldn't be creepy enough...no, no,
this bear costume looked like the cousin of Donnie Darko's rabbit friend. Creepy as hell! I nearly had a heart attack and turned the lights on
quickly, and opened my bedroom door a bit. My guy woke up from the commotion and asked what was going on, but it wasn't exactly something I could
explain properly at that time.
My heart continued to nearly beat out of my chest for quite a while, but I eventually fell back asleep. Had he not been there, I probably would have
gotten up to just watch tv like you did.
But, I've been having these hallucinations since elementary school. Most recently I've been waking up seeing bugs everywhere, which is a bit
unsettling. I blame it to my house being invaded with carpenter ants right now...I'm always paranoid that there's going to be bugs in any room I go
into! I feel like Ashley Judd in Bug! It's ridiculous. Then of course, the paranoid feelings of finding bugs end up being carried over into
sleep...ugh.
Aside from the "bugs," though, most recent weirdness was waking up to a hand coming through the mirror on the back of my bedroom door, waving a note
around. I stared at it for a minute, in confusion, til it finally dropped the note and disappeared back through the mirror again.

There was
no note, but it was definitely a weird moment.
Sleeping is an odd experience for a lot of people. So many sleeping disorders! I'm sure the dude standing over your bed was just a hallucination.
You'll be fine.