Hi:)
I think the anesthesia can do funny things ... since i had my ablation 2 Months ago, i'm having zits all over my body, which i never had before...and i don't sleep that much that i used to.... so it can be from that. But you should go to get your blood checked. Maybe u r having problems with your thyroid...which i had couple of years ago,and i had weight problems. Are you on any medication?
I don't know, but my guess would be to look elsewhere for the cause of your weight gain. Beta blocker are notorious for packing on the pounds. I gained a buch of weight when I got on them. Are you taking any meds?