dreaming baby's gender

Before I had known i was pregnant, i have dreamt of a young man. I have not seen him in my life but I know he is my son. Soon after that dream, i took a pt and i was already 2 mos pregnant. During my pregnancy, i have dreamt 2x about my baby but i couldnt know the gender. Last night, i have a dream again about my baby, and its a boy!!! During my last ultrasound, the doctor cannot tell the gender because i am only 18weeks pregnant. i am only on my 21st week pregnancy. My question is, IS DREAMING THE GENDER OF YOUR BABY, ALWAYS COME TRUE?