Screaming in car seat

AB

So prior to my LO turning 5 months, every time he gets tired in his car seat he would just go to sleep. Ever since around 5 months old ( he’s now almost 7 months) , he screams his lungs out and what’s to be taken out of the car seat when he’s tired😩😩. Mainly only during late evening. Anyone else’s baby the same way or just mine? He just got two bottom teeth’s so I don’t know if this has anything to do with it ?