I have a Nexor finger prick monitor, which I was given by my diabetic nurse - I get the lancets and test straps on prescription. You need to work out what foods make you spike, as we're not all the same.
Low carbing is easiest for me. I almost never have rice, pasta, etc. Cutting out snacks makes a huge difference for me, as does exercise- it doesn't have to be really intense, a longish but quite leisurely walk a couple of weekends ago was good, though I do do yoga and aquafit classes every week.
Emotional eating needs to be avoided, though heartbreak, where I could barely eat at all was effective, but definitely not recommended...
I don't worry too much about eating out, but then I don't often eat out. If it's a weekly occurrence, you probably do need to think more.
It's easier to manage when I'm not stressed, so try to stop worrying too much about it.
I found my GP's dietician not very useful, particularly as she didn't listen to nor answer my specific questions, and told me I'd agreed to be referred to WW or SW, which I very definitely hadn't agreed to. I have no idea how representative she is of NHS dieticians.