What Causes Severe Pain In Abdomen Along With Flatulence And Constipation?

I am having very sharp gassy pains out of now where...run to the restroom and I'm in there for like an hour...very tight sharp pains in my stomach....get very sweaty and sometimes feel like passing out....and my stool looks like mudd very pasty sometimes...I hardly have a solid stool maybe 3 times a month as I only probably have a bowel movement 3 times a week..what's going on???