Hi! It iS very possible that your late period is a result of going off the pill, I had been on the pill for a very long time before going off it to ttc and my system was pretty messed up for a few cycles with spotting and all over the shop cycle start dates, but also in saying that there is a very small possibility that you could be utd. If you are concerned about it maybe see your gp. Good luck and I hope you get the answer you are looking. For! Xx