That's a long time. If you know who you have been referred to, ring their offices and find out if they have the paperwork and what waiting time you should expect. If you live in the city there will be more than one option regarding medical oncologists. There are usually options in the country too, they just may not be very convenient. Always keep that in mind.
It may be the last thing you want to hear, but please don't automatically assume that someone has done what they are supposed to. Things get lost in transit--all sorts of stuff can happen that needs to followed up. Management of your cancer treatment is a complex project--never be frightened to pick up the phone and ask what is going on.