Mind, though. If you can afford it, it's fairly unlikely getting a quick checkup is going to hurt much. Does sound like mostly a lifestyle change thing, but it's not exactly impossible it's something else, or something else on top of said changes. And if it is something else, the earlier you find out, the better.
Maybe consider actually keeping up on checking your weight for a week or two. Iirc, more than two or three pounds of weight loss over the course of a week (discounting normal water weight and whatnot variation, anyway) is potentially unhealthy. Not time to panic or anything level unless it's extreme, but in the range of "maybe check with the doc occasionally just to be sure you're not overstressing anything".
E: Just about the only decently competent LP series of Blacksea Odyssey that I've found is in... russian, I think. Pretty sure it's russian, anyway. Related to that, I have been listening to someone speak russian while playing Pulling Legs Off a Frog, Sci-fi Edition for the last. Uh. Eleven hours. Something approaching straight. Maybe two or three hours in there I was away from the sound, at least. Whatev'.
I don't speak russian. I have no idea what this guy has been saying, save when he busts out the loanwords and/or english. Eleven hours. There has been a russian man chattering nonsense in my ears for the last eleven hours. I just noticed it has been eleven hours. I was not expecting that.