I am on 2x500gm metformin slow release and in the first week of taking them I felt ill being giddy, getting the runs and other things. My BS was 25.5 when I was diagnosed and taking the metformin and changing my diet no more chocolate no bread etc your body is now having to adjust to a lower BS and it does make you feel ill at the time, almost like having high BS, your body is reacting to the lowering of your BS.
As your body adjust to the lower BS so will the feeling ill pass. I did get headaches not really bad for a few weeks but that gradually passed and for quite a few months after my lunch time salads would have to rush to the loo. But this has improved a lot now. Occasionallly still do get an odd day that i have the runs its but nothing like when I started to take the metformin.
I had high blood pressure and was put on tablets and felt really ill at first with them but it was my body adjusting the the BP lowering itself.
So it is the same with our BS when first diagnosed our BS is high we are then put on medicine and it starts to lower our BS something our body has to get used to again and we will feel ill at the time. Seems odd that being made better can also make you feel ill, but I went back to the doctor who said that it was my body adjusting to the lower BS and that gradually it would get better and it did.
Once we have adjusted to the lower BS and are controlling our diet then hopefully you will find things will settle down. Being ill at the sametime as taking the metformin will give you a bad result as you wont know what is being produced in taking the metformin or what is part of your illness so once you have recovered see how you feel.
My DN wanted to increase me metformin to 3 a day after my first Ahc1 (whatever its called) as it was 9.9 but this was my first and I was really working on my diabetics which is hard to begin with so I asked her to delay that as I was new to this and wanted to keep my diabetics down with my food/metformin so she agreed and when I had my next test it was 6.2 brill so don't need to take the 3 tablets stick with the 2 one in moring and one in the evening. Speak to your doc or nurse about the tablets and see if by your diet and only taking 2 metformin makes things better and ask for the slow release.
You do need to test especially at the begining as you don't know how your body reacts to certain foods. (look on this forum for the free tester from Bayer) Its all trial and error. I know I can eat a chicken salad, I eat burgen bread and know thats okay I can have red potatoes but not new ones, have porridge in the morning made with water and just a little milk to cool so graudually you can cut down on the testing once you know what you can eat - eat something new then test. Doing a test now and again just to confirm that your okay to still eat that item. Try a low carb diet its much better they tell you that you can eat high carbs but thats not actually true as we have all found out. Although some do eat high carbs and still control their BS. How I don't know.
hope you get on okay and start to feel better
Sue