Pregnancy or Period symptoms?

I'm 16 days past my due period day. On Cycle day 47. My last cycle was on February 3rd and it is now March 21. I have PCOS and irregular cycles but my period is usually between every 28-37 days, give or take. I have symptoms of bloating and bad lower back pain. Usually I get these symptoms when my period is about to start but because I'm so late into the month I don't know if it's a possible pregnancy sign? Can any of you ladies relate to my situation?