Can you get into a deep squat position whilst lying on your back? For example, lay down on your back, put one arm under your lower back (to create a nice arch, like you want when you squat), then with the other hand, grab one of your knees and lift it towards your chest. Then try the other knee. If you can pull the knees up passed the hips then you have all the flexibility* you need and your issue is stability.
I did and I can do this on my back. My right is a little less than the left but I can do it. I will post the video tomorrow and you can take a look.
I am worried about not making my competition goal because of this.