very odd drowning dream

I seem to have a lot of drowning dreams, I had one once when my best friend was drowning me, once when a little girl was pushing my head underwater, one when I jumped in water with a cement cylinder attached to my leg, etc. And I had another one last night.

I was at my moms friends lake house, and me, my mom, and my brothers dad were driving in a mini van, we talked to some people and they said they wanted to meet us up at a dock or something. So we were driving and we were on a dirt road and a car was coming towards us and in the middle there was a path to the right which there was an entrance to a lake, this is was it looked like ( i drew this on paint) http://i337.photobucket.com/albums/n...kjhkjhkjlh.png
well, I saw them and they gave the a-ok sign, then turned it, it was the gate then the lake automatically, the gate was very flimsy, so, they just drove in the lake, then we did too, at first there was no water then it was all filled with water, I was sitting there trying to open my mouth but nothing would come out, I was trying to lift my head up but couldn't, its like I was stuck. I was flailing my arms trying to talk and move but couldn't, then I woke myself up because I was moving my arms and when I woke up I was sweating with my arms and legs flailing about. What does this dream mean???