Sprained my ankle on Friday falling off a horse on hols. Had it X-rayed yesterday on my return and they confirmed it isn't broken just badly sprained. It is isn't massively painful - as long as I don't do too much - but is very, very swollen (I spent the day in the car travelling back from France on Saturday and that is when it ballooned). I was told to keep it elevated and put ice on it but nothing else.
Should I be trying to move my foot/ankle whilst it's elevated? Also, should I be wearing a tubigrip/support (doc said no but pharmacist and info on NHS website says yes)? 
Also, how long have others' sprains taken to heal? The doctor said 3-6 wks for the swelling to go down and for me to walk on it but that seems excessive. I have a life/job/children so can't spend the next 3 weeks with my foot up on the sofa!! Also, what about exercise - I normally run/cycle regularly and wondering how long before I can do that again?
TIA.