newly diagnosed dmds help

hi all , went to see neuro yesterday for her to explain what was seen on mri also to comfirm definate ms.anyway now i have been told they want me to go on a dmd and have gave me a booklet on them i have the choice of 4 with avonex—extavia----rebif-----copaxone the neuro did say the one most comenly used is the extavia but reading about them all the side effects seem really bad on of them and the flu like symptoms seem to be a right bad one with a lot of people ms nurse is going to phone me in a week about this and wondered what everyone else thought is best , lucy xx