Looking for a dream, dreaming that I cut off my leg.

Legs and feet are tools of action. I don't think you would have cut off your calf if you hadn't been tied up.

This should show that you have been troubled by something recently and are eager to get rid of this dilemma.

What bothers you is probably what you said about the senior high school entrance examination. You worry that you won't do well in the exam, so you annoy yourself.

Actually, there are many choices in life. If you don't do well in the exam, you may not have no way out. As you can see in your dream, cutting your calf without bleeding means that you didn't do well in the exam.

The above is just a personal opinion!