I may be overworrying, but I am several days late for my period. I am usually very regular and am not on birth control pills. I have not taken a pregnancy test yet, because I don't want to be paranoid, but I just finished a week-long Methylprednisolone treatment for back pain. Do I need to rush to take a pregnancy test? I have read that there is some research that suggests a connection between corticosteroids and cleft palate. What do I need to do? Should I call my doctor?