Now that is a really good question!
The thing about fear is that a bit of it will help you, whereas too much of it will cripple you.
You need some healthy fear to play chess well. That will help you to be cautious, which is no bad thing. You should always check for possible threats, even when you think you're winning.
But, when the time is right, after you've checked for threats, you also need aggression. Put the pressure on your opponent, make them feel the fear, keep them on their heels, knock them back against the ropes, keep them blocking your attacks and never able to launch their own.
I would be happy to coach you through some (unrated) games against similar-rated opponents, via Skype or Zoom, if you'd be interested.
Im afraid to lose games and I’m feeling more stressed than I used to. Although I have been doing very well since I adapted a more defensive approach. Is it normal to care about winning or losing that much? How do I shake the fear lol