Hi friends, I am 27 weeks now. My feets are always swelling. Doctor said it's normal at this point of time. How long it will be there..I am not able to get rid of this..

And please suggest me in a day what duration of time should someone walks starting from 27 weeks to till delivery...
Please suggest what are the precautions should I take to avoid scegerioun..does regular; walk; is the part of easy normal Delivery ?