My son is almost 4 months old and won't stop eating. He is breastfed and I'm home all week because…

My son is almost 4 months old and won't stop eating. He is breastfed and I'm home all week because I'm a teacher and we have this week off. He is being extra clingy and won't sleep in his crib for his naps. He is only sleeping on me. This has been going on for 2 days now. Is this growing pains or what? Anyone experience this?