Loud gurgling sounds in abdomen, had a small bowel movement and felt incomplete and still loud gurgling and now I'm panicking that something serious!

Not likely. Constant. intestinal muscle waves of contraction, back & forth, called peristalsis, under both brain & local control, is what mixes the ~7 liters/day of water excreted from blood stream into intestines to mix with food into a thin watery soup; the motion both mixing digestive enzymes with/break-down food molecules & constantly changing intestinal wall exposure for selective absorption. Air in water gurgles.