Wonder week leap 3

Danielle
What was or is your baby like? Mine just turned 12 weeks yesterday but he was born 2.5 weeks early. He's been off for about a week. The past two days though have been horrible. He's just so fussy all day. He screams bloody murder before every nap. Naps only happen if I hold him and even then he wakes up several times (usually crying). He isn't eating well either. This is day three of this. He's still sleeping ok at night. Not as well as normal but not terrible. I keep thinking something is wrong but he doesn't have a fever or any other symptoms. I've tried everything I can thing of for naps. Trying earlier and later, swaddled, dark room, white noise, swing, nothing works. I'm not sure if he's going through a growth spurt/mental leap or if something is wrong.