One of my fears

I am worried that my cycle has stopped again.  My last period started on December 3 and I had PMS symptoms a week before I started.  However, this time I have not had anything but just being a little tired and an increase in appetite.  I am so worried that my period has stopped again because of my hormones are unbalanced.  I really hoped that I was becoming regular and would no longer need any medications to help with my cycles.  I have not had a real big increase in weight, everything is the same?????  I am wondering if intercourse could knock me off schedule??   Could it be that I’m coming on later in the month?? This is why I really hate PCOS!! My body is so unpredictable.