Awww Janie, welcome to the forum
You have already been given good advice here, everyone feels like you do when first diagnosed, its such a shock and you feel so rotten, both physically and emotionally (you can read about my battle in the Success Stories thread), read the stickies and success stories too, but dont panic and dont try everything at once, just take it gentle, be good to yourself, you know some people manage their diabetes by going low carb, this worked for me, but some people swear by just reducing carbs in their diet or doing a low GI diet, what I am saying here is that there are different methods of keeping control of your bg levels, no hard and fast rules there and eventually you will find out what works best for you, we might all be diabetic but we are still individuals.
I know its hard to push yourself to do exercise when you just feel like crawling away, going to sleep and waking up feeling all good and happy again. But believe me you will begin to feel better and be well again and you will feel so confident too once you have your bg under control and learnt more about diabetes, you wont feel so confused and helpless any more.
Dont push yourself because this or any stress can actually raise your bg, so just do the things that you do now and remember that even fidgeting, even twiddling your toes and your fingers and gently waving your arms around helps circulation and is a form of gentle exercise too, it all counts you know, just as a start.
Have you been given a blood glucose meter? What are your readings like? Testing is very important because this way you learn how all the different foods affect your bg, its really very interesting, I promise you that once you have your bg steady and withing near non-diabetic levels you will feel much better and fitter again.
Dont be harsh on yourself, it is very often trial and error, I have made some mistakes I can tell you, I was going low carb, all well and good but did not know so much about it back then, I went to a pub and was so proud of myself for sticking to orange juice and coca cola all night, and I just could not quench that raging thirst and was peeing for the nation, I couldnt understand it, only when someone pointed out that cola and orange juice contain loads of sugar, DUH
Come back here and ask lots of questions, dont be scared of everything, many of us have been diabetic for years and all of us here, no matter how long we have been diabetic will offer support, encouragement and advice.
All the best
Karen x