Hugs Billy! I think you have to give yourself some time. The shock and sense of loss is a bit overpowering right now and it's almost too much to consider.
I lost my dad at age fifteen and it took me forever to really grieve and have a good cry. I was just sort of numb and worse I felt responsible. My point is, that we all grieve at our own pace and the more serious the loss, the longer it may take.
One suggestion, when something reminds you of your mother, don't push it away. Remember her with all the love and care you can. Especially remember the good times and her favorite things. She will always be a part of you and wants you to be happy and successful!