Change injection day or be patient?

Hi! I have been taking Zepbound for 8 weeks now. I did begin my injections on Sunday because it was easier to remember in my weekly routine. I feel nauseous for 1-2 days. I have lost only 12 pounds since the beginning (starting weight: 220). I am supposed to begin the 7,5 mg this weekend. I am wondering if I should change my injection day to Wednesday night, as I would still have more effect on the weekend where I tend to eat more than during the week. I am a bit worried though to feel more nausea and tired on thursday/friday as I am already more tired.. Should I just be patient because maybe the dose I had was maybe not enough to be effective for me?
I am working also on eating more proteins (around 80g/day but my goal is 100 g) and exercise more (2 hours/week now). If you have any other advice for me, please don’t hesitate!
Thanks!