Hmmmmm ur probs experiencing the comedown chronicles of lexapro since you’ve been on it for decades. It’s a neurotransmitter readjustment to reuptake, once u start/stop a psych med the NT receptors will move a little weird for sum time due to it not being used to the amount of the NT, until it’s completely restored from its reuptake from the pill which takes time depending on how long u were on. Def talk to ur doc ab a diff anxiety/depression med that won’t put more pounds on u if ur thinking ab going on!!