Pam, I'm so sorry. It sounds like you did all that anyone could have done.
I hope you have been receiving help and understanding from your family, friends, and the people at your school.
I know that it is hard to believe when the loved one's passing on has been very, very recent but time really does heal these wounds. The anniversary of my Mom's death was 3/10 (7 years). And I didn't even think about it until my brother called that night and mentioned it. I was glad in a way and also aghast that I had not thought about it for weeks ahead of time and all day on that day.