Well, I don't have speakers on my computer at the moment, so no sound. But here's my opinion on the video:
I thought the actual filming was done pretty well. Lighting, angles, etc.
The scene transitions were pretty jerky. Try to figure out some better transitions. You faded out a few times, that looked a lot better to me than just boom! next scene.
The part where she called 911 was kinda messed up, I think you should have figured out a better way to film that whole part. It kind of appeared, then disappeared, than reappeared. I gathered she got sick afterward, so maybe you were going for that effect. I still think, though, that you could have done it better.
The last comment is not so much on filming but acting. If you have a choice of more than one or two people willing to go topless for a film, try to find someone who can take their pants off with a bit more style! lol, I know this is kind of a silly point, but I've watched some modeling-type shows (Battle of the Bods on Spike, I believe it was) and this was something the judges talked about, the inability of one of the female contestants to take her pants off quickly, while being smooth.
Note that I'm not a professional in any aspect of filmmaking, so this is only my slightly-educated opinion.