Had Gall Bladder Removed 5 Months Ago; Felt Great For

had gall bladder removed 5 months ago; felt great for 4 months; now the past month have episodes of stomach pain and around the sternum. i haven't gone to the batheroom #2 in 3 days; and feel sluggish and tired. Throughout the day.. have periods 90 minutes of feeling good followed by 2 to 3 hours of feeling weak tired, and pain in stomach with some upsettness..but never can throw up or go to the bathroom