Gi system

So I have been battling chronic nausea with no real cause, till now.  They did all kinds of testing and ran test after test.  All normal.  I found a document on line early yesterday morning about chronic nausea having a link to neuromuscular disease.  Well i have that.  So emailed it to my dr and he emailed me saying we want to do one more test.  Ok so do it.  I ha asked numerous times in the past year or so for the gastric emptying test since I have a feeding tube, it made sense.  Not only to me but my Pcp too.  It should of been done prior to my tube placement. Now they are doing it.  Well that's great but I have to be without my nausea meds for 2 days prior whic seems impossible. 
My depression isn't any better and I'm grestful it's the weekend.  That much closer to the day I see my dr. Tuesday can't get here soon enough.