If you play with the WW fertility cycle and you try for baby, it won't break your game, it'll just make your sim pregnant, that's it.
Just don't mix the two mods either by ignoring or disabling certain functions and you'll be good. Sometimes I have EA/MCCC sex interactions (aka woohoo and try for baby) disabled (you. I ignore the MCCC birth control option (it only pops up when sims are flirty anyway, so its not a problem, you should be able to disable it somewhere in the 'MCCC woohooer settings) and only use WW birth control. I control all playable households and play them in rotations. I play in a style similar to the way I play Sims 2 - where my Sims do not progress when Im not playing them. Here are the settings Im currently using in my game. Sometimes I have EA/MCCC sex interactions (aka woohoo and try for baby) disabled (you can do that in WW under sex settings), other times I leave them on so I'll know when my sims wish to have a baby (I only try for baby/have sex without contraception when both sims want to have a baby). All you need to do is keep those two apart. MC Command Center is one of my must-have mods for The Sims 4. I ignore the MCCC birth control option (it only pops up when sims are flirty anyway, so it's not a problem, you should be able to disable it somewhere in the 'MCCC woohooer settings) and only use WW birth control.
All you need to do is keep those two apart. MCCC birth control won't prevent WW sex pregnancy, WW birth control won't prevent try for baby pregnancy. You should use either EA/MCCC woohoo/try for baby/birth control options or WW sex/birth control options.
