Sometimes in our relationship, we feel less confident. Maybe it was something he said or did that made you suddenly question your self-esteem or value. This is completely normal. What is not normal is if you let it eat away at you inside.
I've been there with my previous relationships, where I am always the one who compromises, who always understands, and keeps things bottled up inside because I felt like I was the "lesser" one. This gets really toxic and instead of being in love, you are in fear.