What do you think my dream means?

So I am a 22 year old female when I was 2 years old my father was killed by a drunk driver. Just a little bit ago I had a rather upsetting dream that I was at this boot camp type place, and there was a party one night and my father was there (alive unlike reality) and all of the sudden about 20 feet away from me he started throwing up so I ran to help him, he was wearing a red biker jacket and red cowboy boots. As I was trying to help him I said "Dad it's ok I'm going to help you." He responded by saying, "you don't exist." Right at that moment I woke up in a cold sweat, I was looking for dream translators online but found nothing worth while if any one has any insight it would be greatly appreciated.