feeling packed - magnesium citrate?

I have the urge to move my bowels but not a lot is happening. I'm still passing stool but half of the time that I get the urge to, I can't. I'm really uncomfortable......

Someone suggested magnesium citrate in another thread. Would using that without a doctor's advice be okay? I do happen to have some. I wanted to up my magnesium and without researching, used oral magnesium. I learned quickly that topical magnesium was better........anyways, so I do have some.

Extra vitamin c with or without the magnesium may help.