I just recently started taking tecfidera. When I started I had one day of flushing. I then increased my dosage and after a few days developed horrible stomach pains to the point I was about ready to go to the ER. It isn't cramps or upset. It feels like someone had a vice on my stomach. They had me go back to the lower dose and I'm still having the horrible stomach pains and now lots of nausea. Just getting frustrated and not sure what to do. Anyone else feel like this? Thank you!!!!