Is it normal to randomly stop caring about someone?

I’ve been seeing my boyfriend for a little over a year, a couple weeks ago we went on a trip to see a concert. Everything was fine minus him forgetting a few things here and there. Once we got back home, he came and visited me at work the next day since I wasn’t busy. Everything was fine until out of nowhere I became super paranoid and accused him of hiding something/cheating on me. Since then I’ve been really bummed out about everything, my life in general and just don’t really care about anything anymore. I have been experiencing a lot of anxiety the past couple months at my job, and I’ve felt down about stuff… but not this bad.

I’m currently seeking out professional help, but from a regular person’s perspective, is this normal?