I wonder if it may be because you're coming off Pregabalin. You said you battled with your weight when you were on it (before tapering off). I wonder if maybe your metabolism is speeding up as a result of reducing it? Yes, have a word with your GP, it's probably something fairly simple. Do you have a thyroid issue? I've had to stop looking on the internet regarding symptoms.....I had just about every illness known to man!...hope you feel better soon. You've really been through the mill!