That hasn't happened to me. Whenever I awaken from a lucid dream or return from a regression or past life meditation, I feel surrounded with a sense of love and calm and comfort. I cannot remember having dreams, lucid or not, which deeply affected me in a negative manner, though sometimes they have included some negative aspects. When the latter occurs I feel somehow shielded...as if it is more instructional...like a direction to avoid rather than a threat.
Has something arisen in your life now that brought these pains? You might be able to benefit by clearing some past cause of the pain, and its connection to what is occurring now.