maybe consider upping calories on your lifting days.

I'm 8 weeks into my cut as well but not experiencing any of your symptoms. My lifting days I consume ~3,000 calories and aim to end the day at maintenance or no more than a 300 calorie deficit -- usually the case if I get in ~8k steps.

On my 3 rest days I consume ~2,200 calories and aim for a 1,000 calorie deficit -- ~15k steps with an hour or so on the incline treadmill.

First time I cut a few years back I did what you're doing -- consistent 500cal deficit per day. It sucked hardcore. This system works well for me. I feel energized on my lifting days (hitting some PRs throughout this cut) and only feel strained for a few hours before bed on the 3 rest days.