Pregnant?

Just need some lady advice please, posted in another group and got no response. 
My period has been very regular and on time for as long as I can remember. I came off the pill (which I have been on for two and a half years) at the end of last month because I was feeling crook and had pains in my pelvis and the doctor suggested it. They told me I had a cyst but that is should away. 
I am now am late for my period and I'm pretty sure I didn't have much of a period last month while on the pill. I have had a little bit of spot bleeding at the start of the month. And in place of my period I had thick white discharge which I have never seen before. 
I have been tired, feeling a little bit crook, bloating and a bit of pain during sex. Last month while on my pill I also had tender breasts.  
Any guesses? Could it be my cyst?