Thank you for your reply, pinkrose!
First, have you recently reduced or eliminated caffeine?
I haven't had any coffee or tea for over half a year now. Even before that I've never been a big friend of them.
Second, are you eating enough??? If you are not taking your time to eat big meals of veggies with plenty of STARCHES 3-5x/day, you are probably not eating enough. This is a common problem for newbies.
I eat three meals a day and calorie-wise I should be eating enough. I'm already stuffing myself somewhat, actually... Eating more than three meals would be hard / impossible many days because of work. Anyway, if I eat more frequently I tend to eat smaller meals, otherwise I'll be eating on a still half-full stomach which isn't really helping me feel better...
Your body is probably also adjusting to your new high fiber diet. Give it some time. Chew your food thoroughly and be patient.
The thing is, it gets so bad that I can't possibly work in such a state, so waiting is not an option...
Coldness may be related to the lower caloric intake. I am quite familiar with this. It bothers me in the winter but it is not bad in the summer!
I wish I were living in a tropical place...
I would not recommend ANY animal products to alleviate your symptoms. If the sardines make you feel better, it may be because you simply were not getting enough fuel without them!
Enjoy your starches and keep us posted!
I did try to stuff myself even more, but that didn't do the job, unfortunately...
Does anybody else have any ideas on how to fix this problem? I wouldn't like to go back to eating oils / fish because a lot of problems I had before have disappeared. On the other hand I can't sleep all day.