Hi! I think I'm finally over the depression I had from PTSD in combat, but why does everything taste GREAT?!?

The reason why I ask is because I used to hate pumpkin pie, but now I love it, for example. I am now eating full meals instead of bites of things here and there. I'm literally chugging water all the time and I can't stand donuts anymore - they are too sugar-ey for me. Right when I got out of the Marines 2 years ago I started smoking a ton of pot and drinking whiskey but I would never get high from either of them! Yesterday I smoked a little bit of pot and got AMAZINGly high! All of this happened after I snapped and got locked up at the VA nuthouse this past weekend! They changed me from Zoloft (I've been on 200 mg daily for 2 years) to Effexor (150 mg daily) and put me on a 72 hour hold where I couldn't leave because I tried to drink myself to death last Thursday (literally a week ago). But today I feel like I woke up from a dream and I don't even look the same! In one week! What happened? Was I brain washed by the Marine Corps or something? Or did my body totally shut down from combat stress? I don't get it! It's really strange to me! Thanks guys! You all kick ***!