Something fishy or am I overthinking

Okay so my partner has been acting kind of strange lately I just put it down to stress and worry as we have a new baby coming and our youngest is only 9months old.

Anyway fast forward to today I went out to meet my sister with my 2 children meaning I was pushing a pram so I couldn’t reply to his messages..

he leaves work and comes home in panic to make sure we are okay which I thought was sweet until he kept asking what my Instagram story was about.

I shared a quote on my story that’s said “what’s done it the dark will always come to light” not even aiming it at anything just liked the quote tbh 😂😂

Am I overthinking the situation or is something fishy

Bearing in mind he never leaves work if I don’t reply he assumes I’m busy or taking a nap with baby