Kaylz, it just occurred to me, have you got a reference book or App that can help you with carb counts when you haven't got a packet with nutritional info on it? There's a book called Carbs and Calories which a lot of people on here use, which has pictures as well as lists of foods, so you can match things when you eat out, or have a take away.( it also exists as an App, but costs £3.99 and has mixed reviews). I use the myfitnesspal app, the free basic version, where you can type in any food and it comes up with a list of suggestions, and you can choose the one that most closely matches what you've got in front of you if you can't find an exact match.
What you've chosen tonight sounds virtually carb free. That doesn't mean to say you won't need any insulin, as your body will break down protein into glucose, just much more slowly. Sometimes we all report to guesswork, just err on the safe side, and if after four hours you test and you are high, you can do a small correction dose. ( does your meter do this for you? I'm not familiar with the sort of 'thinking' meters). Be careful about doing one at bedtime though, it's probably better at this stage to wake up a bit on the high side than over correct and have a hypo in the middle of the night.
If you wake up high tomorrow morning, don't beat yourself up, just record the results, and next time you'll have more of an idea of your insulin needs. Much as it would be lovely to calculate exactly what you need, it often doesn't work out like that, and with experience, it becomes more of an art than a science.