Howling gale blows down my extractor fan

[Louise Benn]

Hi

We have a small bathroom and there is an extractor fitted above the bath/shower which we have recently replaced as the old one did nothing!
There are two problems - firstly, it doesn't look like it is pulling up any of the condensation when you watch it and secondly there is always a holwing gale blowing down onto you when you are in the bath/shower and it is freezing!!

The fan is in the ceiling and there is ducting which carries it across and outside of the side wall of the house.

I think if we have one with the flaps it will make a horrible racket so is there any other option or is something wrong with the set up?

please help before my butt freezes off!!!!