Black - you're doing well with the weight loss, almost a stone is brilliant - but you're shooting yourself in your own foot with the cheating, and eating off plan - you're knocking yourself out of ketosis when you eat carby stuff, and therefore not experiencing the advantages of a ketogenic diet, ie less appetite, less fat-burning, more energy and fewer cravings. You're making this far more difficult for yourself than it needs to be.
I'm not saying the following to be 'holier than thou', I'm saying it because I have struggled too, and it's a mindset that works for me, and might help you - I don't cheat. Not once in 199 days have I cheated - but I have treated, many times. A treat is a low carb food that's a real luxury, either because it's expensive, or hard to get hold of, or ridiculously high in calories (though not in carbs). I'm thinking of stuff like lobster, or fillet steak drenched in garlic butter, free range chicken served with a creamy mushroom sauce, black truffles grated into my scrambled eggs (only £7 a bottle from Waitrose, haven't yet won the lottery) - that sort of thing. Those are my treats (also oysters, but I'm not expecting many people to think 'ooo!' about an oyster).
The difference between a treat and a cheat is that the former makes you feel great, the latter gives you bloating, wind, digestive discomfort, and above all sabotages your weight loss efforts. It's certainly not a 'treat' in the sense that it's something that's good for you.
If it were my birthday, I'd want to be treating myself, not cheating on a way of eating that's good for me. Worth thinking about?
Anyway, congrats on your loss to date, please don't feel discouraged - and happy birthday for the weekend, too :)