Hello
@Julieep ,
Those levels are quite high. Is metformin your only medication? Do you have any other health conditions?
Testing BG regularly is the best advice I was ever given. I wonder if your old testing kit and strips need updating? The strips have limited shelf life, so could be giving inaccurate readings. Get some new strips and a meter.
In your position, I would be inclined to check with GP, short course of newer meds might help. Though as you have said you want to try without more meds you could benefit from reducing the amount of carbs you are eating. Porridge, muesli, banana, crisp breads, potatoes are all high carb. To get a better idea of what to eat have a look at the low carb subforums. Also there is good easy to understand advice on the diet doctor site.
https://www.dietdoctor.com/low-carb/60-seconds
I would emphasise the need to check blood glucose levels on waking, before each meal, then two hours after starting each meal. Record the levels, and what you have eaten to give you an accurate picture of how foods are affecting you.
Also, if youbare not seeing a reduction in your BG levels within a couple of days, or you continue to feel so ill, please get advice from GP surgery.