Hi, Had Surgery Wednesday & Haven't Had A BM Since.

Hi, had surgery Wednesday & haven't had a BM since. Dr. Wrote RX for Senocot, but I have 2 Surfak 240 mg. gel caps (not sure how old) & also have some Milk of Magnesia Tablets. Want to take something in the morning so maybe I can go during the day instead of taking tonight & I can't get out of bed quick enough.
So, should I take both products? If I use the Surfak, how many should I take? Thanks, Donna