people often talk about art block - when they're uninspired and don't know what to draw - for me, art block is when i literally can't draw, and i really relate to you on that.
Like, when all your lines come out wrong, and the whole figure just doesn't flow at all - i get that mental block all the time, and it drives me round the bend because it means it's rare i actually can draw. there's so many steps to my pages that i can kinda disguise it in colour and light, though. personally, i can't afford to take breaks when i have it, as it's so often - i just do some colouring or shading work that doesn't require drawing ability to do, and pencil in those rare moments when i can.
(right now as it's a heatwave in britain, and i can't function over 25 degrees celcius which makes it worse haha)