I’m realizing that some of us are pushed to the point to be crazy

Do you remember what it was like before getting into a relationship? How you were so clear and your mind was healthy. Now in a relationship and doubting my thoughts process. Do I blow things out of proportion? Am I the real cause of the problem or fight? Am I making things up? Am I the problem? Did I misunderstand everything a pick a fight? Am I toxic? I’m so confused. I can’t think straight anymore.