Did I Save Her From Death?

Let me give you a back story before I proceed. My grandmother has been in the hospital for about 10 days, and 8 of those days, she was on life support and in a medically induced coma.

Now, one night I had a dream that I was walking along this path at night and right next to me there was this huge lake. As I walked a little further, I heard splashing and I looked over and I saw that it was my grandmother in the water and she was having a hard time staying afloat. In the second that I figured out it was her, she went right under the water. I then jumped in the water, and started to swim after her, the only problem that I had was that she kept getting pulled down my this dark force. I swam so hard so that I didn't lose her but it almost felt like I would be unsuccessful. When I finally got to her she was unconscious, but I was able to bring her back up to the surface. When I got her to the surface, I had to perform CPR to bring her back.

When I finally woke up, I knew instantly that this was unlike any other dream that I had and I called my friend to tell her about it. She listened, but was unsure to make of it. By the way, this isn't my first experience with something like this, I was once able to warn my family about a death that was going to occur, on which side of the family, and that he was going to be male and it actually came to be).

A few days later, I told my mom about the dream and asked her what she thought it could be, but she had no idea as well.

Fast forward to when my grandmother would thankfully be taken off of life support and would be moved to a standard room. It took her a while to start talking well because of how long she had the tube, but when she did it was when my mom was visiting her. My grandmother then proceeds to tell her about how when she was out she had a dream that she was drowning and something kept pulling her under, and she told of every detail I had spoken to my mom about. I got a call from her and she said "your nana had the same dream you did down to the details" and I think I turned pale white. This was another confirmation for me, that I have something which I don't understand but I am hoping someone else out there does.

Was her spirit wandering and did my spirit save her? Please give me feedback, I would appreciate it!