Congratulations on solving that problem!
From my experience with MS drugs--3 years on Avonex, 3 years on Copaxone--I have the impression that it pays to keep tinkering with the schedule and with how you deal with the side effects. If one thing doesn't work, you move on to another way and keep on doing that until you have a system you can get along with.
With both Copaxone and Avonex, the tendency to have bad side effects was especially noticeable at first but after a few doses things got better. Maybe that's what's going on with you and Tecfidera.