Okay so for a few weeks now my baby has slowed his bowl

Movements to once a day. His stomach is sometimes so rock hard I use the wind inserts (that frida brand) to help him pass some air and it always results in bowel movement.

He’s been teething now for three days and is fussy because of that but now I’m really struggling to burp him and he’s doing like a whining cry almost where it sounds like he is straining to poo.

He is really unsettled and has just turned into a fussy baby and just seems uncomfortable.

He is teething as well.

Anyone has advice? He is breast fed and one bottle a day