I'm a grown-up person capable of taking care of myself, I cannot literally be abandoned

Often I feel like an infant. I cry, scream, and throw fits and I have to guess as to why. Do I need to be fed? Burped? Put down for a nap? So I take a guess, and do things until I feel placated, but really I never know what's wrong or what will make it better. I feel like so much of life is composed to trying to guess what we want and hoping we get it right.