So i was just playing Sims 2 like a normal person but yes i did things that could risk my game like saving with a ghost active fucking with my sims by changing their species and ages to see what chaos of sims i can make etc etc but Recently my Sim just had a squiggly line thought
It didn't happen only once it happened twice but at the time my account didn't exist here and i didn't take a screenshot but i didn't care but now i am concerned for my game i am afraid i corrupted my game
if possible help me

April Black has a video on the variation of squiggly line thought bubbles and whether they mean corruption or not (and if it's anything to worry about). The other videos are worth a watch, too.
https://www.youtube.com/watch?v=4GauWWd_5DM

(Judging by the type, it's most likely a case of the "missing thumbnail" issue, which can happen with stuck/invisible objects, CC, and the occasional food item. In most cases it's harmless. Potentially it could happen if the sim is thinking about buggy/deleted characters, though it seems that squiggly is a bit different).