I haven't had a period in four months the last time I had sex was two days after my period ended I have had all the symptoms of a pregnancy but recently my period started I was wondering am I still pregnant or was it my mind playing tricks on me

You should go and get a pregnancy test right away, I got pregnant in feb of 2012 and bled my first 4 months around the time of my period, You could be pregnant and if you are you definantly need prenatals and obgyn care, And sperm can survive in your vagina for days so it is possible you got pregnant shortly after or on the day you last had sex..