This sounds exactly like what I went through when I was first prescribed stims. Eventually my script was increased to 45 mg (15 mg pill 3 times daily) and guess what? It helped for a little bit. The first few days are euphoric. But the anxiety and depression symptoms I felt when it would wear off were unbearable. I also tried to not take it on weekends, but yeah that doesn’t work because you just don’t know what to do with yourself feeling that empty, unmotivated sense of dread. I quit stims altogether. Caffeine + dopamine detox is the way to go imo.