Sherry - I am so sorry for the loss of your beautiful little girl and I'm so sorry for your injuries which prevented you from saying goodbye to her for one last time. I can only imagine the grief your Mum is going through but with children in the car there are not enough pairs of eyes or hands to control everything.
Perhaps, when you are feeling stronger you can all get together to make a Celebration of Katelyne's life which may help. You are right about one thing, we are never the same after the loss of a child and it takes a long time to get your head around that - but you will get there. Times changes us, very slowly until we are able to forge a 'new me' out of the pieces of the old 'me'.
You are still so very early on in your grief and have had to recover from your own injuries - please try to be gentle with yourself and take one day at a time. The first year is the worst obviously, the following years get 'different'. My daughter died 8 years ago - my life hasn't been the same since she left but it did change and the change brought me another happiness, different but worth living for. I'm here for you any time you need a rant - we get the most understanding from others who have experienced the absolute worst thing any one has to endure and that understanding will get you through some of your hardest times. Hugs sweetheart xx