suskisims123 If script mods aren't activated, you will see nothing from a script mod in game at all.
Slow startup for Sims 4 can be mod-related -- typically this is because you have a large quantity of mods (tons of CC) and have left on the option to show the list of mods and CC on startup. Try turning that off. Alternatively, delete all the stuff you downloaded just in case you might use it someday.
If you have issues with compatibility between two mods or with a particular feature, head to the creators' support to find out why. Both Childbirth and WonderfulWhims are currently fine if you're on the most recent versions.