Exactly this. Weight can and does fluctuate. It's life. I was ill last year with the flu. Not just "I have a nasty cold", I mean, full blown, "I can't move and I'm dripping sweat and breathing is hard" flu. My weight stayed fairly level but I lost a lot of muscle mass. it was horrible. And I get how such things can make people feel like crap, especially on the back of a nasty illness.  But  the best thing you can do is get back to it and sort it out. Sure, it's hard and horrible. But the rewards are so worth it