Definitely test those oatcakes, porridge and the bread to see what those are doing to your blood glucose.
Test before eating, then 2 hours after. If your bg has risen by more than 2mmol/l then the portion size, or the food does not agree with you.
Re the weight gain:
Lots of people manage to lose weight easily on LCHF. Some dont. I am one of the ones who don't.
But doing LCHF means that we need to reduce the amount of carbs we eat down to below our own personal carb tolerance level. Only then will we see the real benefits. And each of us has a different tolerance level.
Being female, middle aged and with assorted hormone issues, plus any history of weight gain and/or yoyo dieting seems to make the LCHF weight loss more challenging.
Personally, to lose weight I need to have the perfect balance of several things (which is rather rare)
- drinking enough water
- being active enough
- being under my carb tolerance (which is about 20g carbs a day)
- enough sleep
- not too stressed
- avoiding foods made with grains
(notice how I haven't mentioned calorie intake, or fat intake? lol)
Your 'perfect formula' may be quite different, but you should be able to find it, with trial and error.
Also, any chance you might be constipated? That often happens until we fine tune our veg intake on LCHF and is a surprisingly 'weighty' issue