Stop being so hard on yourself, things change when you have diabetes but you have to take little steps first. The doctors will try to get your diabetes stable first but while they do this it is normal to feel down. Try and learn as much as you can about diabetes and medication that you are taking and ask questions if your not sure about something. Most people feel overwhelmed when there life gets turned upside down with diabetes. All you can do for now is keep checking you BS and over time the more you will get to know about your diabetes, none of are the same what work for me might not work for you. If you believe in yourself and take one day at a time you will learn. If you are feeling depressed see your GP or tell your tell a DNS as they might have someone within the diabetic service who can help you, failing that you can always talk on here as we all have advice from our time with diabetes. Keep talking to someone as depression and worry can effect blood sugars. WE are here and on your side so take everyday as it comes and good luck