Do I'm Not Pregnant? My Tummy Getting Bigger And Round

Do I'm not pregnant? My tummy getting bigger and round and my hips wider my breast getting bigger. What about the pulse and heartbeat inside my tummy? Did I answer wrong that my last menstruation was October 29,2015 but I got 1 day last February 1,2016? How it could happend that I have polycystic ovary left? And why the doctor says I'm not easy to get pregnant while my 2 kids i'm so easy to pregnant? Please I need your opinion. Thank you and God bless!