I had a lot of back pain and consulted a physiotherapist. He stated that my spine is not aligned and will need correction. So he did some procedures like heat therapy and another machine that gave small currents on my back and then some manual correction in which he was pulling my neck. Anyway I went for one sitting and since then I feel very dizzy when I sleep on my back. Im fine while standing or laying sideways. Is this normal and what should I do to not be dizzy?