Please guys super embarrassing?

Omg im so freaked out!!!!!!!!!!!!
Im 15 and am in grade nine first year of high school here in Ontario!!
Anyways i was at school today and im kinda failing science so i went to see one of the guidance counsillors Mr. Whitlock at my school! Cause he is helping me try to pass!
Anyways i was in there for about 45mins and when i went to stand up there was blood all over the chair i was sitting in, in his office!!!!! I was like **** under my breath and sat now quick!!
And he said everything okay??
And i said no!!!
And he said whats wrong?
And i said um i hope your not mad at me but i kinda started my period and its all over the chair and my capris!! (they were white!!!)
He said Oh and gave me his sweater and told me to go to my locker and get my gym shorts and asked me if i had any pads or tampons and i said no cause i wasnt expecting my period!
and then he said okay i will go get you one from the office!!
So i put my gym shorts on and went back to student services and he gave me a tampon

i gave him back his sweater which was white and said sorry and he said no problem dont worry about it!!
Omg im so freaked out! I have to go back to see him tomorrow about science and im really embarrassed about it!!!
(he is pretty young like in his late 20)
so what do i do??????????
thanks!
Jenna
Plus i put this under guys cause your guys so yeah!!

he sounds like a sweet guy.
don't be embarrassed. its not like you could help it.
i'm sure hes very understanding about the whole thing.

Jenna, I was a teacher for 20 years and we are used to these type of things happening. If you want to say thanks for the help get him a thanks card and simply write thanks for the help the other day inside and that way you don't have to say anything and it will be over. Then you can get on with your school work.

I realize you are embarrassed but it is a normal part of life. he is an adult and understands that. There is nothing to be concerned about as it was nothing done on purpose. There is no need to walk around like you did something weird. I had a teacher have her white pants turn spotty red for the same reason. She excused herself and changed. No one in class thought anything of it.

I don't know, sounds like it went pretty well... But at my school, some girl had her period, and it was during her choir class or something, and everyone saw it. She's REALLY mean though. She's like, 3 feet tall and has a voice so high pitched and annoying a dog couldn't hear it. But everyone called her strawberry strudel. Which is kind of a dumb nickname for that. So be happy THAT didn't happen. Imagine if you didn't see it...