I am so, so sorry you've had to go through that.
On a discussion about strained parental relationships, someone on this forum recommended the books 'Emotional Vampires: Dealing with People who Drain you Dry" and "Toxic parents." Maybe it would help you to do some reading so you don't feel so alone.
I'm so sorry you're going through this during a very happy time in your life. Your parents should be happy for you, not shaming you. Don't listen to them. I'm sure you will be a beautiful bride!