My son just turned 5 months on the 29th and lately he's been discontent with anything we do. I put him in the sling, he fusses. Exersaucer, he plays for a minute, then fusses. Swing, fusses. Floor time with toys, he just rolls onto his belly, tries to crawl by getting on hands and knees but falls over and fusses. He's relatively happy, laughs and smiles between the fussing. No fever, no teeth. Can't figure it out. I think maybe he's in the awkward in between phase where maybe he can't do what he wants to do? Idk, just curious if anyone might have suggestions. Oh, he recently stated going from 1 hr 15 min between naps to closer to 2 hrs.