Thanks for all of your help! I realize that my jacket has a breathability rating of 650 gm/m^2-ish (or less), which is kinda appalling. Aren't most jackets out there at least 5000? I didn't feel wet and clammy on the mountain, but maybe there was moisture trapped in the jacket, making me cold!
I've been looking at merino baselayers/midlayers too. Would you recommend me buying bases or mids? I've looked at capilene, smartwool, merino, etc. Keep in mind I'm a kid so I would prefer something cheaper. Yeah, my parents will help me out a bit, but I only have money from birthdays, mowing lawns, etc.
I might be able to go to the local ski shop to check things out today. What should I look for?