Your health is the most important consideration!
Speaking from my experience, leaving work was the best possible choice above any monetary considerations. I was so stressed!
When I did my calculations it didn’t really look doable but I decided I couldn’t stay another year. It turned out that I could live perfectly comfortably for that year, and I’m sure you could manage for 2 years until that extra income kicks in.
I went through all my standing orders/direct debits/subscriptions etc and weeded out everything non essential.
After finishing work, my costs reduced or vanished - travel, work clothes, lunches, coffees, constant contributions to never ending workplace collections(!), numerous lunches out with work colleagues etc etc.
As others have said, I saved money on cooking/baking from scratch. Instead of buying new garden plants/planters etc, I took cuttings, repaired/recycled etc. I had more time to shop carefully which resulted in less waste.
In the end, I needn’t have worried - I sometimes felt better off!
I’ve stuck with many of the economies and have saved money to spend on things I really want to.
You can get a lot of satisfaction from managing, economising and being less wasteful.
Apart from all that, I felt so free after the pressures of a highly stressful job! Time to appreciate my garden, the birdsong, nature walks, the ever changing skies, a nicely baked cake, playing with my cat. The list was endless.
You can do this!