Did you just start your meds? Sometimes it takes a while before they work to the point where you have the desire to do things.
When I was first "getting back on track," I made a goal of doing just one productive task every day. Yeah, it wasn't much, but at least it was something. Maybe you could pick just one goal, like eating one extra serving of vegetables or going for a ten minute walk. You might take a long time to lose the weight, but if you make small changes, you won't be overwhelmed with a bunch of new lifestyle changes that you have to keep up all at once.