Im not sure what all these "this type of behaviour" replies are meaning, well obviously yes I know they are implying controlling behaviour, but the husband said he would call in an hour & the wife has waited up for that call, he hasn't called, which reading another post is not the norm for him...I don't get how that equals that the wife is controlling, I mean if we went down that route, how can we not know that the husband demands she answers the phone when he rings, whatever the time day & night. If she doesn't answer a call then he will accuse her of being with someone else, not caring etc, so she dare not go to sleep???
Its just simply something they do, nothing controlling about it. OP I would consider though reassessing that, it's not healthy to be sat waiting at night for a call, because that then has a knock on affect, you are more tired the next day & parenting becomes harder. Maybe if you both feel the need to have to contact each other at night, have it so once a person is greeting ready to go to bed, they just send a message to say:
"I'm going to bed in 10mins, if you're free give us a quick call & if not, have a good evening, speak soon, sweet dreams"
Put your phone on silent & get that much needed sleep.
Business trips are all about networking & that does go beyond those 9-5hrs & if with a client, they can't be getting their phone out or sneaking off for calls that client has to feel like all attention is on them, it could be the difference of closing a deal. Your husband obviously believed he would be finished within the hour, but things took a change, so if you just change it that once it's bedtime the person just sends a text, then he can't get caught out, predicting a finish time & it not going to plan.
OP, you said you aren't doing so well, there is support out there, start at your GP, incase you need medication, look at local charities - do a search on the net of something like postnatal support near me, mental health support near me, mh support for mums/parents near me, etc. Often there are local groups set up - Facebook & Nextdoor is a good place to look, or again search mum & baby groups near me, parent support near me... Etc.
If you want any help looking for places/support local to you, I'd be happy to help you find some, it can seem a bit daunting knowing where to start.