Is it normal to have a dream about a dead parent but...

Okay, I have posted and asked about a dream I had concerning my dog that I lost a few years ago to kidney failure. This time it's about a parent.

At first, when my Mother died (In Sept. 2013) I had night terrors, ultimately ended with me staying in a ward/asylum for about 9 days. I had severe panic attacks, lost weight, put on weight, drank myself into oblivion, the works.

To understand the "repeat" dream I'll explain the death. It was oddly enough Sept. 13th (Friday the 13th, now I have a phobia of the number 13, I guess, with good reason, I can see it and all, not that big of a deal but I avoid it for the most part and hate every 13th day of every month) and basically she burned to death. I am well aware I'm an easy target for people being idiots on here, but anyone reading this far, perhaps will not offer sympathy, not looking for it, but just an honest observation, now back to it. It was a house fire, she died, I had to identify the body in the back of the ambulance since my sister was living there and the house was a complete loss so they didn't know who was who and my siblings were not in the area nor reachable.

Now I don't get night terrors of seeing my mothers corpse, which I would've assumed would be in the dream. It's always a loop replay of my crying on the phone with my friend in Cali, jumping out of my car and running to the cop on the corner of the street on his radio. I remember the blank, unsympathetic look on his face when I asked "did she make it?" he didn't answer just looked at my blankly, I asked several times after that and then he sad "_______/(My mothers name)? Oh, no she didn't" then back to what he was doing, then I get to about the point where I feel like my right ankle gives out and fall on the sidewalk by the adjacent church that was on the other side of the street. The dream stops there and loops back to me pulling up, talking on the phone.

I often wonder if I have terrors about that part because that was when I first got the news? But if it's because of realization, why wouldn't it be terrors of when I saw her body? Also, I to this day have no recollection from seeing her body and then a few minutes later, having a cop lighting a cigarette in my mouth, standing in front of me. I remember walking to the ambulance, grabbing the side bas to climb in, seeing her body, at firs not recognizing her? I don't know why, at first I couldn't recognize her *Her face/neck/hair wasn't burned but they had her wrapped in a blanket because everything else was* but then when I dd, there's nothing. The cop who followed me to the funeral home to set up the death certificate told me it took about 3-4 officers to pry my hands off the side bars of the door and told me I screamed something that literally scared him and didn't stop screaming until nothing else came out of my mouth then I collapsed, it scared people having a bbq down the street at the park enough to get everyone down who wasn't already down since there as still black smoke billowing out of the concaved roof at this point.

I have been diagnosed with PTSD amongst other things now, I still refuse social security, a weed card, etc because I know I can still work and although I used to smoke it recreationally, weed gives me panic attacks now, oddly.

So back to the question, why would I have looped night terrors of getting the news I lost my parent, as opposed to maybe the blocked memory of clinging onto the ambulance or even seeing a parent dead? Isn't that more traumatic than just an officer telling me news? Sure he was cold about it, but I cannot be that sensitive?

What do you think?