Questions from 10 Days Mr. Goenka Vipassana Course?

When I was trying to do Vipassana at home, I experienced vibrations in entire body. But there, in the Vipassana training centre, my face becomes so heavy that I could not focus on my body. **Why was that happening?** Whenever I closes my eyes my entire face starts with vibrations. When I was trying to focus on nose, automatically I felt something very strong between eye brows, but gradually I was able to neglect it. One day my a certain part of my left arm was on fire (felt literally burning). **Does that mean something?** For every question, teacher had the same answer: “These are previous birth mind’s Disorder which are healing now”. On 6th day again face was so heavy, so I gave up and started talking with other people who were not so serious, bunked classes, went to the mountain near by, then I felt a bit normal; on lowering my diet I felt more normal; on 9th day I felt vibration flow in entire body only on surface of body. In between, for 3 consecutive days (4th, 5th, and 6th days), I saw a Dog, Snake and Centipede before sleeping, as soon as I closed my eyes. After attending this course I have more clear knowledge of how this technique works; but I want to know, **is that all Buddha taught, or is there something else?**