No cm

Keisha • ttc #2 for 9 mos, have a 7 year old daughter. Ready for my next little pumpkin!
Hey guys, what does it mean if my body makes little to no fertile cm? Could it mean that I'm not O'ing normally? Hubby and I have been think of trying pre seed lube to help his little swimmers, get to where they need to go. Any pre seed users out there? Is it worth trying, or a waste of time?