Hiya Lucycharlotte -
thanks for the compliment! I am not a doctor, but I am a neurobiologist, and the subject for my M.Sc. degree was our brain. It is immensely fascinating, studying it is like one's favourite pastime hobby.
Your head feels cloudy - are you on clomipramine for a short time? All medications for our brain take time to 'settle', to bring a new balance. It is not unusual that there seems to be some 'mist' in your head. I wouldn't worry about that if I were you, just keep track of how it develops over the coming days. But be careful in some decisions, e.g. whether you should drive.
The girl you know put on weight, you write, in a time when she used antidepressants. Now, the pills need not necessarily be the cause for that. Perhaps she took on a different lifestyle, with less exercise. Or she changed her diet. Or it just happened, without any proper explanation at all. And finally, it's the story of one person - she may not be representative of all users of antidepressants (I know people who got thinner, actually).
Oh, and this: I don't know the documentary 'The Marketing Of Madness'. But I find the title pretty ominous: 'madness' isn't a polite term to describe mental disorders. Therefore, I get the impression that it might be a rather sensationalist film, about Big Pharma trying hard to unleash as much of their product as possible on unsuspecting people, for financial gain (and possibly with the assumption that many folks get antidepressants who don't need them at all - i.e. are exploited by doctors collaborating with Big Pharma).
If I am right, it's not the kind of film that will have a reassuring effect on you - but well, I don't know it, as I said, I'm inferring it by looking at the title. Movies about conspiracies always go down well with the general public, and thus generate... money.
Please don't see this message as an attempt at moralising, I tried to formulate my thoughts as well as possible. And I wish you lots and lots of luck in your attempts to get better.
Byebye from Cuthbert in Holland.