For about a week now I have been experiencing bloating, slight abdominal cramps, stomach gurgling noises, and slight lower back discomfort.  I feel like I am hungry a couple hours after eating when normally I could go longer.  I have had constipation and now there are loose stools.  My lips and mouth are dry even though I have drank a ton of water (urine is clear with no pain during urination).  I am on birth control and I am due to get my period in a week. Any advice is appreciated.