Doctor's recommendation

I am so confused! Went to my doctor appointment today expecting to be prescribed another med to try since the Savella didn't work and also to discuss the new food regime I was going to start. Instead he prescribed something for the fatigue he said and when I came home and checked it out, IT IS FOR NARCOLEPSY! lol  Has anyone been prescribed Nuvigil for their fatigue???  He also wants me to begin giving myself injections of B12, he feels the pills are not doing the job. However, we did not go over how to do the injections!!  I didn't even ask because I was still in shock that he told me I needed to take some time off work!!  FMLA/short term disability he believes will be the most beneficial for me right now until we get my symptoms under control.  I have reservations about this for two reasons: 1) we are short handed right now at work and no one will be able to do my job that easily . AND  2)  I have to have a 100% of my pay or I cannot make it financially.  I am so confused on what to do.  He also wrote me a prescription to start aqua therapy three times a week, I go for my consultation tomorrow.  Has anyone else had to follow these steps?? LIke I said a few times I am so confused, lol.