I started jogging 3/week and eating substantially less after a bout of anxiety (my appetite was reset) about a month and a half ago. In ~3 weeks, I had lost around 13 pounds! I feel much healthier, but I also feel slightly disoriented - like my body is light, and like I'm overcompensating in my movements. I'm not stumbling around, but it's still noticeable, especially when I haven't had much sleep. Is this usual with rapid weight loss? Will my brain readjust?