I am so sorry that you are feeling stressed out and concerned about what your parents will think. I am one of those parents and have put a lot of pressure on my kids -I think they are amazing and deserve the world and I am sure your parents view it similar.
Their disappointment most likely is not personal - they just want you to be rewarded for your hard work and don’t want to see you disappointed.
I know my kids did not view it this way and felt they were disappointing us - that was never the case and I am glad they spoke up at one point to let us know how they felt. (only after they were in college)
Huge parenting lesson learned - I hope you can talk to your parents about how you feel and please don’t take the rejections to heart. You put yourself out there - hugs to you from a trying to reform pressure mom.