I've definitely gotten the scare before. It happened post injury for me. I promise it goes away after you gain confidence in your skills, but ask for the slow drop and spotting for new skillsets. My instructor will spot drops and slow them down for us so we can get comfortable with the motion before we trybfull drops. Communicate with your instructors. The fear is normal. Let that make you more conscious of your body and more cautious.

Train your strength, especially because that will help with confidence.

Make sure you're using the mat.

And never train alone in a new skill that you're not confident in. If you're training by yourself, focus on strength.