Oh man, I also had a Tecfidera reaction from hell! Same thing, lose dose - perfectly fine. Two days after switching to the higher dose I start to get intense stomach cramping and nausea and two days after day I vomiting every four hours after I take the pills. Stuck with it for three days hoping it would go away (with help from every anti-nausea med in the book) but no dice. Discontinued and back on Copaxone. Don't like the needles too much but they are a hell of a lot better than vomiting and needing to make up excusing for quickly leaving work and friends!

Hang in there!!!