I see on your profile, sniffer, that you have T-5 through 8 fractures. It doesn't say iwhether you are "complete" or "incomplete". Your summary says that your lower body function is "eroding". I'm T-9 incomplete. In my case, I can't move my lower body, but I can feel a little. I think that small enemas are a good idea. Especially if you are able to use a toilet and get cleaned up afterwards, small enemas are good for you. I don't know specifically about Microlax. I haven't researched "what's in it". Just warm water would be my preference.
Sniffer, because you've had enough function to be able to walk, you may never have had to remove your feces the way a "more paralyzed" person has to do it. I put on a vinyl glove, then lubricate the fingertips with olive oil. Then I reach around and insert my finger in my anus. When my gloved fingertip taps something round and firm, I gently coax it out. And there will be more behind that. I keep removing feces until the little "holding area" is empty. You may have to start doing this for yourself if the suppositories aren't getting the job done. There are also other bowel helps such as Peristeen. I haven't had the opportunity to try those.