Terrible Dream Experience

I have had several "Lucid" Dreams in my life.. Some very very vivid.. as if it was a out of body experience or perhaps a "vision" of some sort. Anyway, last night scared me pretty good. Yesterday my husband and I celebrated our 6th year anniversary. We ended up fighting late last night and he slept in the guest room. I was pretty tore up about it. Well, to make a long story short, that might be the reason I had this dream. My main question is that during these dreams can they physically hurt me? Let me help you understand.. My dream started off with my husband and I in a house with another couple. He got up and left for work. I went back to sleep in my dream. I DREAMED in my DREAM that I then got up and was looking for him. I was yelling John, John.. (his name). The wife said John is right here.. refering to her husband also named John. Then she said "What husband? Who is John?".. I was telling myself that he was being "erased" for some reason in this dream and if I could just wake up he would be there. So I frantically tried to wake myself all the time screaming his name. I pinched myself, rammed my head into walls, I even jumped up to the top of the house and jumped off down to the ground trying to wake myself up. Then on my way back to the top of the house.. John was climbing the other side. I saw him, but he was blurring.. kinda like moving around I couldn't focus on him. I was screaming, John... and he was yelling back "Wake Up!!!!, Wake Up!!!" Then right when he came in focus in my dream I felt like I fell back asleep in my dream and he vanished.. it was really weird. I was telling myself to wake up and I couldn't. I thought for sure I had died in my sleep, or was in a coma for weeks and he was there yelling at me and I just couldn't wake up. During this time I could feel my heart pounding and I was very hot in my dream.. to wear I actually took all my clothes off.. knowing that I was in a dream and wouldn't matter.. anyway, I finally woke up in real life and it took me several minutes to realize that I was finally awake. I was wondering if I was still dreaming.. it was weird. Any insite would be great! Here are my weird questions.. can these dreams hurt you? Is this caused my lack of sleep? Oxygyn in the body? Suffication? Could I have a heart attack? Could I really go into a coma? .. Think I am weird.. but it was just so freaking scary!!!!!! Help??? :o

Imagine where you live and you get a tornado *warning. Pretty scary stuff and what if you see the tornado coming? You will be terrified. In dreams you can experience the same feelings. Yes dreams can hurt you just as the DT's can kill a drunk.

:?:

Dreams can hurt you, but it's all in your mind. Your brain basically sends signals of pain to itself, but it won't be real pain. Your mind cannot create any lasting damage to your physical body in dreams, it can only simulate physical pain.
Don't worry, it's extremely unlikely that you would be put into a coma or suffer any lasting physical damage through dreaming (unless you are sleepwalking and bump into something), although it's possible to wake up with aching or numbness in the areas affected in the dream.
This dream was very possibly caused by your row with your husband; anxiety has a habit of creating these kind of dreams where pain and uncomfort are felt.