laummatt! yay! a fellow coeliac sufferer! its a pain and add in the diary intolerance and my diet is pretty restricted - don't worry too much about the bmi and weight - i struggle to keep my weight up too, its a constant battle, but am starting an exercise regime this week in the hope that building up my muscle mass might help!
in terms of diet and appetite - i am dictated to by a) how busy/tired i am and b) where i am in my cycle. 2 weeks prior to af i get starving and the rest of the time i only get hungry at meal times. i stick to a high protein diet - lots of white meat (chicken and turkey), some pork, oily fish (salmon and mackerel) and beans and pulses. i also eat lots of fruit and veg - carbs are brown and basmati rice, potatoe, gluten-free pasta and things like buckwheat noodles. i also buy gluten-free breads/rolls but only tend to have these on my days off work! a typical lunch for me is a tin of mackerel, one whole avocardo, mini tomatoes and one or two gf (gluten free) ciabatta rolls with diary free sunflower spread. for work i make pasta salads with grated carrot, mini toms, aduki beans and tuna (usually with some mayo or pesto). i am also a huge fan of home-made soups - i like thick, chunky ones like bacon and lentil with added potatoe! as long as you are eating well and getting the right number of calories each day then don't let it worry you.
with your blood needing nourishment, think about getting an iron suppliment. i was diagnosed as boderline anaemic last year and its obviously had a big impact on my overall health. i now take, religiously every morning, my Spatone sachet which has iron-rich water in it. and don't forget your dark, leafy veg like broccoli, spinach and kale - all great for iron. eggs are also a great source - i am sensitive to these too but i do use them in any baking i do.
hope some of this info helps and keep me updated x
p.s. temps sound great, fingers crossed for you x