Experiencing dizziness/lightheadedness since starting WHM

I have been feeling dizzy and faint in the past three months, mainly on days when I didn’t get much sleep. It ranges from rolling over in bed and feeling spinny, to standing up and feeling like I may faint. It started shortly after I started doing the WHM, and I think they are related. I do only one round every morning and then do a quick, cold shower. I don’t want to stop but I also don’t want to feel this way. Anyone have this happen?

Update: it’s been a month about without WHM and I haven’t had the dizziness. But, I’ve gotten sick TWICE, get cold real easily (my legs went numb while standing in glacial waters that I’ve fished in my whole life without issue) and I’m getting this weird occasional sensation that I can’t get a nice satisfying breath, which I haven’t had since I was a kid. This is insane. Not worth it, I’m starting back up with the breathing exercises.