sick without weed

i started smoking before my freshman year to help with my ED and generally just my poor relationship with food. any time ive either ran out or taken a t break, i get discustingly sick. like non-stop nausea and vommiting, headaches, basically all of the above. ive tried eating smaller portions of food overtime, but nothing ive seen other people reccomend works. even if i do end up eating/drinking something i throw it right back up. does anyone else struggle with this and is there any remedies?