Rollercoasters are a nightmare, I hope your mood becomes more stable soon for you

Good luck for the week ahead, you definitely deserve the break when it gets to Friday!

Having been in a job that I felt was killing me I think you have to work out if it is really worth all the grief. Does the money outweigh your sanity and your wellbeing? For me it didn't and when I was getting dangerously close to the edge I handed in my notice. While I understand you have bills to pay etc it may be more difficult for you but probably worth it IMO.

And if you're not working around the clock you have more time for you, and more time to find the job that would suit you better

Hang in there though, you can do this!