Obviously everything I say will be wrong, but personally I was diagnosed on 12 september last year and I did not let them get away with this stupid fixed doses thing, I was desperate to fix the whole thing as soon as I could and I could not have lived with it, I got them to explain how the ratios work and it was not very complicated. It doesn't work very well even then but I would not put up with what you are putting up with.
If I say much more some mod will tell me off but just prepare to be told to do things that are impossible, and then they will tell you it's OK if you don't do them. It is totally confusing, I now have absolutely zero trust in doctors who seem to contradict each other all the time. If you can be ready for anything at all, be ready for the fact that it just does not make sense, and they will try to scare you to death to somehow make it make sense.