When I was your age I was quite the opposite, but since I've gotten older I get/stay cold much longer/easier and my nose, hands and feet are almost always cold.
I did have tests done and I'm not anemic and now that I don't have a thyroid and have regular testing done (and take my meds) I know it's not from that either.
I just try to keep myself warm by taking hot showers, then bundling up afterwards in my heated throw. I always wear socks, even to bed sometimes where I also have a heated blanket!

If you think this coldness is not normal and haven't been feeling yourself I'd suggest you have a checkup.
Good Luck getting warm