3 month old never naps and gets cranky everyday!!?

My daughter is 15 weeks and is like that too. Lucky for me she doesn't get too cranky. Try swaddling his arms. It works well for her, she'll sleep about a 4-5 hour stretch at night before she starts waking up to feed constantly. I also started tucking her in by covering her legs then tucking the ends of the blanket under the sides of the mattress. I also give her a binky and turn a fan on high (not aimed at her). She's sleeping pretty well on her own right now.