Struggling on 50mg Elvanse

Hi, I was diagnosed with adhd combined type in June of this year, been on every antidepressant going as well as diazepam and zopiclone over the years non of which really helped long term. Hit perimenopause at 41 and my symptoms began spiraling out of control and I could no longer mask it, finally I asked could I actually have undiagnosed ADHD and sure enough that’s what it was. I started on 20mg of lisdexamfetamine for 6 days, then when up to 30mg, 30mg did help with focus, motivation and concentration I would take it between 7:30 am and 8:00am but by 13:00 it was wearing off and I felt exhausted and would lose all the motivation etc, I was titrated up to 50mg 10 days later to achieve a long lasting effect but I feel like I’ve gone backwards, I have far less motivation, excruciating heads, zero appetite, and feel almost empty and emotionally blunted. Has anyone else found 50mg too high and does anyone find 30mg Elvanse with a dex booster for the afternoon useful. Also in regards to my depressive symptoms how long in general have people found it takes for depressive symptoms to improve, even mildly?

Thank you sorry it’s such a long read, I’m just not sure whether to take my dose tomorrow? I have a review this week thankfully.