What Causes Constant Tiredness And Dryness In Mouth/lips?

Yes hello, these past few days I seem to not get enough rest even if I sleep for a good period of time. My stomach has been doing the La Macarena - making me go more frequent. Plus my mouth and lips are constantly dry. A little information about me: 30 yrs old, over 250, 5'7 in height, and......I think that's about it