I dont know what to eat i get full pretty early

Can i have like icecream chocolate or like cookies to gain more cal becase i get full really early because i'hv been eatting so little for super long like 5 years. I'hv been straved my self or took diet pill for the pass 2 years to keep my goal weight and anytime i started to eat like normal people i started to gain weight pretty fast i just dont know what to do rightnow. Im starting to eat and exercise but it dose made me gained so much weight it went from 94 lbs to 110 today im 5"3 i cant wear any of my clothes i feel so fat and ugly, i was a modeling and nowaday i cant do this job anymore i feel so sad. Could anyone help me about my diet plan pls:))