And, most importantly listen to a professional before listening to random internet advice - Even if it comes from me.
I recommend going along with what you're doctor says, but do your research. If there's something you feel uncomfortable with or a doubt you have, tell the doctor. Whatever conspiracy theories have about doctors, money, and government mind control, most drugs doctors deal out for these sorts of things only have mild to moderate side effects, and those are most noticeable when you first start taking the medication. There's a reason that doctors give these medication, and a reason why people take them: They usually work.
If it makes you feel better, start up an exercise regime, pick up a hobby, and study something (Don't just memorize for a test). Exercise gives your body natural endorphins, hobbies give you a sense of progression and bolster endorphin growth, and studying makes you smart, resulting in yet more endorphins. Endorphins make you happy, and can, in the least, soften your crashes if you remain consistent. Making wise health choices in general is also recommended.
Refer to your doctor if you want to hold off on medication to test doing your own thing out - But remember that it may even be easier to start doing more things on the medications. Your doctor will be the best reference of knowledge there for your unique and particular case. Also refer to your doctor if you want to stop taking the medication for whatever reason, as you can crash easily after dumping a medical regimen if you do it improperly.