Child loss

Me and my boyfriend lost or son at only 18 days old to sids he passed away January 6 this year. When i mentioned to my mother that btw and i are trying for another she got very angry and said I insulting my sons short life and trying to replace him. I have a void inside me i wish to fill. He was my first born son. My life is empty in supposed to be taking care of him i don't know what to do with myself i need to mother something. Please tell me your opinions. Greatly appreciated.

Thank you for your condolence and replies i wish i could get what she said out of my head. I keep hearing her hatefulnesd