bowel movements in middle of night

I have been having loose bowel movements at 3 or 4 am for almost 4 months now, My doctor gave me sleeping pills and a book on insomnia. These did not work because it is a physical urge to go the bathroom 5-6 times between 3 and 6am. Have changed times of taking other meds (blood Pressure) to the morning, stopped taking magnesium, began eating/ drinking 2 hrs before bed, and going to bed earlier, (9-9:30 pm to try and get some sleep before I am wide awake running to bathroom. I also take 3 servings of calcium a day for osteoporosis, ordered by my endocrinologist.

My GP doctor has never had a patient with this.
Tried relaxation, deep breathing, change of sleep place, all to no avail...She said I can have a colonoscopy to see what is going on. Does anyone have any suggestions to this tired and frustrated woman?
( It really helps seeing I am not the only one with this annoying issue.)

Deffo have the colonoscopy. Nocturnal BMs which wake people up are a symptom of IBD rather than IBS. I'm not saying you definitely have IBD, but it's certainly a possibiity. In the meantime you could try taking an Imodium before bedtime.

What about trying a lower dose of Imodium? Like half a pill or something.