The strangest dream

As I write this now, it is not as fresh and intense as it was when I woke up in the middle of the night last night. It was one of those dreams that stick with you long after you wake up. Like it really did happen and it will affect the rest of your life and it takes you a while to shake that feeling.
It went like this. I was coming out of the hospital with my mom. I was limping horribly so I assume something was wrong with my feet. We slowly hobbled over to a area that was like an outdoor cafe. As we sat there chatting (not really but the dream made it feel like we were) I happened to catch something going on just past the my view of my mother. About 75 yards beyond where we were sitting, a person was lying head first into a rather deep and neatly trimmed, grassy, ditch. The ditch had fast, running water about a foot and a half or two deep, but it was just enough to cover most of the person's head. A person was lying head first in the ditch. As they lay there, their body quivered and jolted but her, yes now I can see it is a woman, her arms lay by her side while her head just remained covered in the water. This was obviously someone with a physical disability and they fell into the ditch and did not have enough motor skill or strength to get herself out of this position. The body shook and twitched as I assume her mouth worked like a scoop, filling her mouth and lungs up with the ditch's water. It shook for a moment and her body went limp. This was all realized in a second or two in the dream. I said "Christ"! and shoved the table aside and bolted right to her. Never mind what ever was wrong with my feet. I had to save this woman I knew. Yes I knew her suddenly! I have saved this person before in a life threatening situation and I had to save her again. I pulled her up from the ditch, laid her on her side to allow the water to drain back out of her. It seemed like gallons of water flowing from her stiff, blue lips. As it kept pouring out I yelled for someone to call 911. I kept talking to her and telling her that it was going to be all right. I was here again and she would be fine again. Life seemed to slowly come back to her body. It seemed like 10 minutes but I am sure it was only 30 or 40 seconds. Slowly like a sun rising, she was back. I saved her (Again. Where did I know her from?). We embraced and we were suddenly riding on some unknown mode of transportation going to some unknown place. We were kissing like she was a new love. Like we were on a long awaited first date. She was beautiful and new. Then I woke up. Wow, that was intense I thought. In seconds I remembered where I knew this person from. I knew her from a previous dream I had some time ago, but I'm not sure when. A dream where I saved her from another life threatening situation, but I can't recall from what or how or even what the dream was about. I just know that is where she is from and that I saved her. Strange thing is (as if that isn't already strange) I don't really know this person in any other way at all. She doesn't exist. This is just someone I dreamt up.