Need some Advice, Going off pill &I having period issues

Nikki
Hey Ladies,
I'm just wondering has anyone experienced going off the pill after being on it for a long period of time and found that there periods seem to become very irregular. 
My last period was around the end of August, I've done a pregnancy test and it came back negative and I also had an ultrasound done in the middle of August and that was also negative. (For some other potential health issues)
I justed want to know what you did or get some advise on what to do.