Everyone grieves in different ways. Your mom is wrong to tell you to just get over it! I have lost a granddaughter both my parents and my closest brother. I grieved in very different ways with each. It takes time to go thru the stages of grief and they don't come in order either and each may come back again. Give yourself time. Find a place to go so you can cry without anyone tell you to suck it up! I am very sorry for your loss.