Game crashing since my sims moved house

OK so it says the Ram usage is around 1300-1400 Mb when saving. Sorry for being a time waster but the problem seems to have resolved itself when I opened the game this morning. The house was really glitchy when they first moved in (they would just randomly get stuck in the foundations) but it seems to be fine now. A few weird things have happened tho :# I have errortrap, overwatch and mastercontroller and suddenly i got like 15,000 vehicles have been removed when it only used to be about 80 and I got a few script errors for my sims. They also went to the riverview hatchery and all the fish disappeared and when I clicked on the water there were no options to fish!!! Idk what is going on I will try reset everything as I did not know you could do that.