Flash ROM'd GS4 but root access went away. Help!

So I have a T-mobile Galaxy S4 and I had recently rooted it. Went to go flash a ROM on it and after I booted the phone up again I noticed that superuser was missing from the app list. I checked root checker and it said my phone was not rooted. Currently running 12.1 CM android version 5.1.1. and I tried rooting the phone again but no matter what method I try the process fails for whatever reason. I tried going into clockwork recovery mode but since I don't have root access it won't even let me do that. Really confused and would really appreciate some help. Thanks in advance.

Edit: By the way the ROM is running fine and smoothly. Just don't have root access and can't root.