I applaud you for saying, I am done. I like the way I look and even though you know you could lose the last 20 or so lbs you have decided to get there and maintain it is not what you want to do.
I met my goal, wanted to lose an additional 10 lbs. I changed nothing in my diet and exercise routine but yet I have quit losing. I know to lose the last 10lbs I need to count and measure everything but I am not willing to do that. I am working on building muscel and maintaining my loss. So far so good.

Congrats on the weight loss!!
If you are happy where you are at, then that is what matters most. I'm with you on the whole BMI thing...I think it's a good tool, but it's not the end all and be all of measuring health.
For my height, I shouldn't weigh anything less than 160 according to BMI, however I was completely happy (and healthy) at 170. I wouldn't be unhealthy at 160 by any means, and it's still a goal I'm shooting for, but 170 is perfectly acceptable to me. I'm built like a brick sh!thouse, very big boned so I think that does make a difference.
Hopefully you get everything sorted out with your doctor (both the goal weight and dizziness issues). Good luck!

Well, I really don't think water is an issue. I'm drinking a minimum of 3 litres a day. *L* I can't drink much more without, like, sloshing!

I'm definitely going to cut down on the damn workouts. If my weight loss stalls, then it stalls...I'm not going to kill myself over this, you know? If my weight stays at 140, then to me....well, to me that says something.

Congrats on all your progress and I think you're making the right choice! Your health is what matters and should always come first, and since you are happy with the way you look, there's no point in continuing with the weight loss. Numbers don't mean anything, you're the only one who can identify your ideal weight and size.

You've done well! - VERY well! - if YOU are HAPPY with your success, then that's all that matters. BMI be ****ed!

As for the dizziness, I can so relate! - BTDT... finally had to see an ENT specialist & found out I suffered from "vertigo". Egads... feels like you're upside down on an endless merry-go-round! But a simple "hanging upside down & turning my head a certain way" event in the doc's office had me feeling like me again.

I hope that's all your dizziness is about! -& not something more serious!! Vertigo is pretty straight forward & generally means you have some "rocks" loose in your ear. I know, sounds crazy, but true.