four weeks is too soon especially for a cheddar, I recommend you to leave it at least 6 months, if you cut it now its flavor will be very mild and it will be a little acid too. If you are too curious to see how the cheese will taste just cut a little peace try it and wax the rest, that way you will see that is not ready.
But I highly recommend you to leave it alone at least for 6 months, and if your are patient enough wait 1 year your patient will be rewarded.