I have been a sahm for 15 years.
I am married, on the mortgage and the deeds, have access to all monies earned by Dh, never have to ask for any money, I just access it. Just like he accesses it when he needs it. I own a car in my name paid for entirely by Dh.
Yes I did do as many dinners as possible but they key is in the words, as possible. I also tried to get as much as the housework done as possible during the day.
However, Dh was a full hands on Dad and knew that some days are harder than others. I was the queen of batch cooking and the slow cooker which meant that a lot of dinners were very easy.
Ds2 was an entirely different child, severe reflux, under a paediatrician, on prescription formula and was literally attached to me to stay upright. Demanding baby and a 3 year old meant less time to do housework. Dh understood this as he parented both children when I went out for the day/night/weekend.
OP you are in a vulnerable position because you are unmarried. What is your housing situation? If rented and he gave notice you would really struggle to find somewhere to live, that actually happened to a woman who posted on here.