he drives me crazy

Okay this is hard to put in writting but my fiancé and I have been together for 8yrs. He is a hard working older man that is very sex oriented. As he has stated " my way or the highway". Kinda crap & I have always been free, job to job but life long making little money with horses.
So his view its not enough & always had to get crap jobs like gas station or store clerks. Its not me.
He wants the house clean and I clean because I like my home clean but I cant keep up sometimes with life & forget to tidy up, pick the litter or dishes, then im a slob
If iam working a real job then he helps pick up but now his argument will change to more sex.

Its always a revolving 5 different things.
If iam not working than I tend to the house, dinner, lunches, laundry, take care of all our 18 pets
(We have a farm) mostly farm animals & 4 house pets.
before you fall off your chair lol.

if im not being sexual or working becuase I feel ill or tired for more than 3 days then.... I don't do it for him anymore & I should find a new place to live becuase I dont make any money or pick up the slack.

Also travel a hour to work at a horse farm a few days a week & work. I only get paid on commission & sometimes we wait but then its a nice lump sum.
Always have little cash, I buy everything for the home. Bathroom supplies, kitchen items, groceries, laundry stuff, smelly lavender things, I fill the home with its needs, pay our 250 cell phone bill.

Its not enough and im stressed, over worked, under paid & tired. I do not have a normal womanly cycle & when it goes out of wack it effects our sex life even more & longer time.

I need advice or help guidance. I just cant understaand what iam doing wrong

I don't think you are doing anything wrong. Your man is unpleasant and up his own a##e.
I have been in the same type of 'relationship' nothing I did was ever good enough. The house had to be spotless, he would even look to see if he could find a speck of dust, check the dishwasher to see if I had put the stuff in the 'right way' (his way) as if it mattered! If it wasn't in 'the right way' he would rearrange everything, I would then be told how, useless, lazy and incompetent I was.

" my way or the highway".

Yup. He used to say that. When I said I thought that was unfair he said "Tough".
Eventually I left, I still loved him, f##k knows why.
I was so right to leave, I was heartbroken but relieved.
After a while I got over it and wonder why I ever liked such a nasty control freak in the first place.
Probably because I'd had a NPD 'mother' and thought being treat like s##t was normal.
I don't know if leaving is something you have considered but you deserve better.