HELP! My clinic is closed for Easter weekend and I am supposed to have my day 0 scan on tues. I was told I must have had/started my period by then. What do I do if I haven't started? My cycles have recently been all over the place ranging from 28-33 days. I am on day 31 today and getting nervous it will be close to the wire for tues. I've never wanted my period so much!