After a long shitty weekend in jail, I fear it is time that amphetamines and I take a short hiatus from each other. How can I do so without gaining a bunch of the weight I've lost back?
Taper down?
Get a mg scale and some empty capsules, fill them and take orally, every 2nd day a little less. This way you should get rid of most withdrawal.
For hunger attacks keep some fruits nearby. Of them you can fill your stomach as much as you want without gaining much weight.
If you want something stronger, you might try hoodia gordonii, a cactus which kills appetite. It was used by natives in Africa to hunt so should be for real.