Oh my... I am SO sorry to hear this. Loving prayers are going up for Tammy, her family, and to you, Jonny. God bless you, and comfort you.
I know that Tammy is in Heaven now, free of the pain of this world and that, through Christ, we will join her there someday with great rejoicing. When that day comes I'm going to hug her and tell her exactly how much she means to me. God blessed us all with her friendship.