Me, too. My weight's always been stable, and I work at it and exercise. Some tendency also to fluid retention. But since Covid Aug 22, gained 24 lbs and retain a lot of water all the time. Internal medicine told me yesterday it was my fault. I should go to a dietitian to look at my diet. He suggested I binge eat! He said only two reasons one gains weight: diet and/or exercise. I've always exercised to the limit of my ability. Not a good doctor. I'm so mad. And mad at myself I didn't set him straight. Good luck with b12. My energy's low, too.