So sorry to hear this Poodle lady. I can totally understand your level of fear and frustration , not only having to deal with your Diabetes , which is never straightforward at the best of times but having to care for your Husband . You must feel very alone with it all right now especially when you turn to someone for help and you get a response like that, terrible.
I agree with the suggestion of going to see your GP. If you have your care under the Hospital and feel they are useless for you, then you may also have the choice of switching your Diabetic care to your Dr's surgery ,if they offer that with a Diabetic specialist GP. My surgery offers this for Type1 and 2''s, but my hospital team are great so I choose to go/stay with them..Hopefully you will have choices, go and talk to your GP and see.
Also, come into the Type 1 Diabetes forum, I'm not the greatest at giving dose adjustment advice but some of the members on this forum are great at it, they me be able to help you work out units to carb ratio's ,even though your Nurses should be helping you with this...but obviously not in your case :evil:
Please try and ask your Nurse/GP about the DAFNE courses, which are invaluble for information on carb counting, and just how Diabetes effects you in general, and how you can make it work for you as best you can. It gives you a good knowledge base, and a starting point for you to be able to communicate with your HCP in a more informative ,productive way. It will really help you so do ask about this, push for it with your GP to back you up on it and get you on a course ASAP.
Hope some of this helps, please hang around as there are a lot of great people on here that will be able to offer good help and support .Which it seems the later is what you are in need of, just as much...hope things get better