I had my period on July 27th.  during the month of August, I had intercourse but I had my period on August 24th which lasted 5 days than normal.  it usually last 3 days.  Lat month(september), it didn't come and I wasn't having sex.  And now, it is October I am worry.  although I have always been irregular and sometimes it skipped a month.  I want to know what happen, am I being paranoid or should I take a pregnancy test?