I concur with @andbreath 15 mmol/Ls is not an emergency they can go a lot higher , like in the 40's. That's not to down play your blood sugars, but just to give it some perspective.
Do consider talking to someone, whether at CRUSE ( https://www.cruse.org.uk/ ), or via your GP.Thank you both for being the voice of reason xx As I said, I am so confused with it all that, yes, I do tend to push the panic button. It really doesn't help when you look up things on the internet and they make you panic saying that you need to seek medical help immediately or go to Accident and Emergency! My GP does have emergency appointments but they insist that they are for 111 referrals and they won't budge on that which just puts more strain on 111. I am in such a heightened state or worry and panic lately that I can't seem to calm down and as you say, it's making things worse. My GP did prescribe me some Diazepam when I was not sleeping or eating just after my partner died but I only took it when I was feeling extremely anxious and I'm not sure whether I can take it now or not. I think I do need calming down xx