This is very good advice. If you have been fitted properly you just have to ride for awhile and get used to it. If you do not see that anything changes over time than perhaps you should look at equipment changes.
I am assuming that you are using some type of chamois butter for the chafing and bike shorts with a chamois. I may be lucky but I have not found a seat to be uncomfortable yet. The longer you ride, the more accustomed you get. Seats are expensive so make sure it is actually the seat and not just a break in period that is the issue.