I came off the birth control pill Microgynon 30 at end of December. I got my first false period from the pill shortly after and my first proper cycle started on 7th January and lasted 58 days ending on the 4th March. I thought this was just my cycle adjusting to being off the pill and the next cycle started. However I am now on cycle day 53 of my 2nd cycle with no sign of my period and I have a negative pregnancy test. I am getting a bit concerned now. Is this cycle likely to be the same length as my previous one or is it likely to be longer? Should I be concerned?