Okay so I can't buy any clothing for my sims, the action for it just disappears as soon as I have asked the sim to do it. I know it has nothing to do with boolprop testingcheatsenabled true because I have that turned off. Anyway, I really need some help with this as it is driving me crazy because I can't buy any clothes for ANY of my sims
Any help would be greatly appreciated

Did you do the entire Game Help:Game Problem^wiki FAQ? Specifically, what happened when you removed all of your CC? What happened when you used a newly generated save game?

Wait so, if I haven't backed up my game since I got CC, should I just make a back-up now?

Back-ups are always good to make. And yes, you should definitely make one before you start taking out CC and testing your game for problems.

In that case I think I will start backing up my game more often in case any of these glitches happen again

I'm confused on a step though, because it says that I should back up my neighbourhood, so that on my desktop I should have the neighbourhoods, downloads folder and savedsims folder, but then on another step it says that the problem will either be with my saved sims and/or downloads

The backup instructions that I see say to copy your entire Documents\EA Games\The Sims 2 folder to your desktop, including all subfolders. That includes the Neighborhoods, Downloads, and SavedSims subfolders. So, you should have only one folder on your desktop, named "The Sims 2".

Once you have a backup of your game, then you start trying to find the problem in Documents\EA Games\The Sims 2. For example, you can remove the Downloads and SavedSims folders from your Documents\EA Games\The Sims 2 folder without worrying about destroying your neighborhoods or losing your CC, since you have a full backup on your desktop.