Anyone else just feel like everything is too much?

So my partner and i have recently had an argument, he’s done and said things he shouldn’t but denies ever saying/doing it and all round just makes me feel like i’m going crazy. It’s not the first time something like this has happened, several occasions he’s done it and i’ve even ended up being convinced that maybe he didn’t or that it wasn’t as bad.. but this time i know for sure he’s wrong!