 [ Symptoms ] late period  i last had my period on oct 14th i believe to have ovulated on october 30 or 31st due to egg white mucus my cycles are usually 27 30 days i am now on day 35 all pregnancy tests have been negative could i still be pregnant and if i am not what could cause my period to be so late [ Disease ] possibly vitamin b12 deficiency or other demylination disorder due to severe nerve impinged in the neck or rarely ms brain mri and cervical xray and b12 vitamin analysis are recommended