I personally wouldn't do a pouch reset (I've read too many negative things about it) or liquids/protein shakes only - that's pretty hard to sustain for more than a couple of days. Just start eating the way we're supposed to - protein first (60-80 grams a day for most of us), then non-starchy vegetables, and then, if you have any room left, a small serving of fruit or "healthy" carb (like something whole grain). Log everything you eat and be mindful of your overall calories (and calorie range is an individual thing - you may to experiment for awhile to find your "sweet spot").
I agree with the above posters that a support group might be helpful, too...
also, some anti-depressants can cause weight gain. I'm not sure about the one you're on, though. If it's one of those that does cause weight gain, maybe check with your doctor to see if there's a different med that might work for you?