Reglan and sick to my stomach

Have been waking up feeling sick to my stomach every morning for a month, eventually goes away after 3 or 4 hours but the feeling of having to vomit nothing was terrible. Went to the ER and was prescribed Reglan 4x a day. I now take 5 mg before most meals and usually a 10 mg only before bed. Makes me very drowsy, especially when I take 10 mgs, it's almost like I'm not even coherent. Another thing I noticed after only a few days of taking it is my eye started twitching and I have never ever had a problem with a twitching eye before and it has been twitching a dozen times a day. Also have to go to the bathroom a lot more often. I don't know if I should discontinue or what.

Definitely take the smallest dose possible.