Hi all
Ok, i am a little nervous, as i stopped takeing metformin a week ago because of the side effects (i was only on them for 14days)
However im still loseing weight

I have packed away loads of food (1400-1600cal) just to keep my weight up slightly but its still coming off a week later with out trying.
So getting alittle nervous as not sure if its still a little metformin in me,thyroid, or something more sinister.
I'm confused by what you are saying?
You are a Type 2 and have always eaten very few calories (is that right?). - So have you always been very slim?
There are a lot more slim Type2's than people realise estimated as much as 10% of Type 2's are slim i.r normal BMI or 'underweight.
I was always slim up to having my 3x Cardio Bypass at which point I was put on Statin and doubled down on my low fat high complex carb diet (I don't mean counting calories). That so - called healthy diet made me put on around 28lbs making my bmi 25 and gave me Type 2 diabetes.
Ditching the statins and going on a Low Carb High(er traditional) Fat way of eating reversed my diabetes (normal HbA1C) and made me lose weight even though the higher fat part of it increased my calorie intake.
I eat lots of fatty cuts of meat, fatty fish, eggs, nuts and cheese plus low car veg (strictly some of that 'veg' is actually fruit such as cucumber, tomato, avocado, courgette).
I never took any diabetes medication, but from what I understand Metformin takes about a week to build up and start working, so I suspect it takes at least that long to get out of your system. However it is an appetite suppressant rather than something that makes you lose weight (unless it gives you the trots). In fact anything which helps raise your insulin (almost all T2 drugs except those that make you pee out glucose) are likely to help you gain weight (because of the extra Insulin) rather than lose it!