Tyvense spaced out

Hi everyone, I was diagnosed with ADHD a few months ago (26F) which explained a lot in hindsight. I just started on 20mg Tyvense and the first 4 or so days were incredible. I felt like I finally was experiencing life like everyone else. I could do laundry, go for a walk, do my food shop etc whenever I wanted/needed to and didn’t procrastinate or put it off for days on end. I was so happy something had finally worked after years of struggle. Around days 5 and 6 I felt it was wearing off after lunch but was still getting by pretty good. On day 7 I was due to go up to 30mg and that completely spaced me out, it felt really awful. I stopped that and went back down to 20mg from yesterday but still have that feeling now, although not as bad. I should also add I’m still way more productive in work than I was before. Has anyone else experienced this or does anyone have any thoughts on what might be going on. TIA 🫶🏼