Need to rant

So I recently started a job at a gas station that pays $8/hr. Sounds good right?

Well anyways, the manager works the cashiers 5 days a week with 2 days off. That's it. My schedule for example looks like this:

Work 3 days off 1

Work 2 days off 1

And our responsibilities include but is not limited to:

•filling the ice on the fountain drink machine (we have to carry in 4 20 lb bags of ice and carry one by one up a step ladder)

• filling coffee

•filling the slashes

•stocking cigarettes and tobacco

•cleaning our designated section of shelves

•sweeping the floors including the bathrooms

•mopping all the floors

•Taking out the trash

•running the register (obviously)

•running the lottery machine (which is hard as hell)

•watching the pumps (there's 16)

•sometimes when the guy isn't there we have to fill the coolers

It may not sound like much but mentally and physically it is especially when your manager puts pressure on you to do EVERYTHING in i hours.

Well I was trained for 3 days and she threw me in by myself on the first of the month (the busiest days) and I was so overwhelming.

Well when I get home I'm so tired I can't stay awake, and my feet and back kill me. I don't really need the job, but my husband Is making me keep it so he can pay for 2 trucks ($1200 together) that he agreed to buy and it's killing me.

He makes almost $1000 a month and we do good. But I feel like what I'm making isn't worth me breaking my back over. It's physically draining me more than when I was a nurse aide on night shift for 12 hours a day 5 days a week.

I BEGGED my husband to let me quit but he refuses. I don't know what to do. I know it's my job to help him but I'm afraid that he will force me to stay where I am.

(To add: I have a toddler I have to bath and stuff too when I get home so I mom alone the majority of the time)