I have been dealing with chronic pain since I was 14, and I'm 36 now. My advice - get better advice than you'll probably find here. "Growing pains" is a completely bullshit term. When you body hurts, it's an indication that something is wrong, period. Pain can come from injury, but it is also largely chemical and neurological in nature, especially once it becomes chronic. At your age, hormonal changes in your body chemistry might be involved. It might sound weird, but nutrition can have a big impact. Sometimes even just a deficiency in certain minerals can be an underlying culprit (magnesium for example). Don't make assumptions like this yourself, seek out a good doctor who will run various blood tests. Depending on where you live, this kind of doctor might be difficult to find. Taking prescription medications is very unlikely to fix problems, they are more for dealing with symptoms. Sometimes that might be necessary, especially if the pain is negatively affecting your life, but it won't do much (if anything) to actually fix structural problems.
Many people think anti-inflammatory drugs will take care of it, but they typically just mask the source of the inflammation, and damage your health in the process (liver, etc.) The guy who mentioned using weed probably doesn't realize that while cannabis can be useful, it can also contribute to the same neurological pain cycle. Sleep is super important, 7-8 hours a night in summer, and 9+ hours in the winter (natural production of neurotransmitter chemicals like serotonin and melatonin). Do a little reading on "neurotransmitters" on wikipedia for a good outline what goes on behind the scenes in your brain.
Finding a good doctor can be tough, as this type of medicine is an emerging trend. Chiro can be useful, but not a fix-all. Naturopathic doctors tend to approach pain from the right direction, but you can't count on initials after someone's name to decide whether their advice is sound. Bodywork in general can be very helpful (massage, phyical therapy, Rolfing, yoga, pilates, etc.) Learn how to stretch properly before you hurt yourself worse (after skiing might be even more important than beforehand).
Also think about the other things changing in your life that don't seem related to the pain. At your age, your diet, sleep patterns, stress, interests, etc. are probably different than they were even a year or two ago. Just dealing with school and social life can really drain your energy resources. Adrenal stress is a pretty common pain-catalyst for young athletic types, and left un-addressed, can really affect your life in the present and down the road. Good luck bro, the internet is full of into on this, both accurate and not. Be wary of know-it-all attutudes, and be careful what you put into your body. If something hurts while you're skiing, don't ignore it. If I had some of this info at 14, I wouldn't be broken now. Take care of yourself and good luck.