Bad dreams last few nights

Two nights ago I had a horrible dream and I woke up sobbing. I dreamt that my daughter had died and I was in her funeral. She was about the age she is now which is 10 or maybe a little older. All her school friends were there and we were all crying. Last night I had a dream that my father paid my way to go to Florida to go to my sister's baptism. But when he picks me up from the airport he confesses he lied about why he sent for me. He takes me to the hospital and I see my sister who is 9 months old hooked up to tubes and monitors. He tells me she has Hepatitis C. and begs me to donate blood to her. Why am I having these nightmares? I am scared to go to sleep tonight because I don't want to have another bad dream!