I guess I was expecting more changes after 3 months, and really disappointed that I've not lost any weight and am feeling a bit disheartened. I really want to get off the Metformin asap. Does anyone have any experience of being in the gym
As far as weight loss is concerned, I have exactly the same results as you. I went to my GP at the time, after 6 months of some serious gym/pool/golf/Personal trainer work and a calorie restricted diet. He said "Rome wasn't built in a day" which is why he is now my ex-GP. The main problem was that he didn't have a clue about diet.
The major thing is not to give up and definitely
DO NOT FEEL DISHEARTENED, that is definitely counter productive. You have achieved something by getting into the habit of exercising and watching your diet, you can build on that. Keep chipping away and trying different things.
What you have shown is that weight loss isn't always just about eating less and exercising more, if it was it would be easy, unless you have problems with eating which is another problem altogether and a category that a lot of doctors seem to think we all come under. I actually followed the Bariatric Surgery route (up to a point) although not keen, not eligible because my BMI isn't high enough and after seeing a psychiatrist and a dietician, not having an eating problem, but a weight problem that the medics can't help me with.
It's possible that muscle has increased and fat decreased. On the other hand, in my case, I have been using one of those machines that tells me fat/muscle/water percentages and have even checked it's results with something called a "BodPod" at London University at Westminster. The "BodPod" is considered to be the gold standard when measuring fat/muscle and used by many athletes who are trying to keep %fat down and %muscle up, so I was impressed with the accuracy of a simple set of scales. Net result was that fat and muscle stayed the same but people kept saying how I looked thinner and I can only think that certain muscles tighten up and hold you in, or fat moves around or should I say disappears from one place and appear somewhere else.
I'm currently waiting for the results of some tests I had done, with the help of my Nutritional Therapist, looking at my microbiome and also my hormone levels. We shall see what happens.
Don't give up, all the best.