I'm sorry you're having so much trouble, but...you're only 2 months out. A LOT of people still feel like crap at this point. You need to focus on getting in fluids and protein---toss the crackers, pretzels, ramen noodles, and any canned pastas. They're not just not good for you, they're actively BAD for you at this point. Get yourself some protein shakes, and gag them down if you have to. I promise you'll start feeling better if you can force yourself to get in a minimum of 64 ounces of liquids each and every day---more would be even better.
Post-op depression is fairly common---did your surgeon not warn you about this? So is the hair loss. Google 'telogen effluvium' and you'll learn more than you ever wanted to know about why this happens, and when it will stop. (Having a second surgery will only make it worse, BTW.)
If you do ultimately decide you just can't live with your RNY, here's a link to a list of revision surgeons. At 21, I wouldn't want to live the rest of my live MO, either, and these guys can help you get the most effective, kindest WLS out there.
http://www.obesityhelp.com/forums/revision/4599894/RNY-to-DS -revision-surgeons/
Good luck!