SO not as excited about pregnancy as I am

So my So wasnt exactly thrilled when we got pregnant its not that he didn't want to have a baby it just happened at a not so great time financially for us and its hard for him to be excited when he's one of those...IM SUPPOSED TO BE THE PROVIDER men and he's already struggling to provide for us and my kids from a previous relationship that he has taken on the father figure role for he was driving semi locally making about $1,200 + a week and was let go due to having to many accidents most of which were minor infractions and wouldn't of happend had he not been sent somewhere he wasnt ready for and didn't have the experience needed to drive in those kind of places like Chicago and new York etc now he is working a factory job entry level position at $9 a hour until he gets hired on full time and get roll over pay at $13.95 an hour....what can I do to reassure him we will be ok and will make ends meet so he can start enjoying this pregnancy with me