Suggest Treatment For Lower Stomach Cramping And Diarrhea

I started w/ lower stomach cramping as an onset of diarrhea yesterday afternoon. I rushed home to sit on the toilet for almost an hour relieving my bowels with continued & increasingly stronger cramping. I began sweating & had to remove my wet clothes. Next, bright red blood & mucus & clots came out followed by strong chills. I laid down & still have the cramps. Every 30 min or so I go back to the bathroom with about 1/4 cup of blood & mucus coming out. I'm 55 years old & take arthritis meds-mobic, plaquenil, & hydrocodone. I started taking a baby aspirin which has helped my arthritis pain for the last month & lowering the amount of hydrcodone to 2 per day instead of 4. I always take food & milk with my meds. Could the aspirin be the cause of my now 12 hours of discomfort? Do I have to see my doc or will this eventually stop? Any advice would be welcomed. Thanks for listening.