Hi Nimm, welcome to our forum.
I edited your post where you mentioned the name of mod you were using. Our forum policy is strongly against using mods and CC, and therefor we are not even naming them here. Please make shore to reread The Forum Rules (Link is in my signature).
Thank you,
Anushka
PS about the issue, when you are using mods and/or CC it is always the first guess that bug is caused by them, just as you asumed too. You may simply try removing or renaming the Mod folder from My Documents/EA/Sims3, and run the game without custom content to see if that will change anything. In any case I tend to do a clean reinstall of the game each time bugs start appearing.