anxious annie-
I know how you feel about leaving the house, I dont take immodium but I get the perscription LOmotil and I take one every morning after my BM's and I'm great for the rest of the day. I never worry about looking for bathrooms while I'm out, it stops the urges, cramping and calms my stomach.
My GI has no problem with taking it every day he even wrote it for me to take more than one a day but i have never needed more than one.
I dont use immodium because I find it causes bloating and pain, plus its not covered by my insurance so the LOmotil is much cheaper and works so much better.