many members here including myself use API master liquid test kit.
basically in a very short explination
your filter will grow bacteria wich is good ok :)
it takes between 6-8 weeks to complete,so yours should be well on it's way.
the water readings you want from your test kit are.
while this is taking place please do not clean your filter at all,when your cycle is complete
you can give the media a rinse in the water you take out on the water change day,
then i think you only need to rinse again once a month,you won't need to change anthing
in the filter on a regular basis although the LFS will tell you to do so.unless there
is stuff in your filter falling apart,don't change it. :)
you can carry on with small water changes,as this will help the fish during this time,as
the toxins in the water build up,this will help dilute it.
i would advise you not to buy any fish at this time,as they will add to an already unstable bio load
and will probably not make it.
i'd just like to say i wish you a speedy recovery from being not well too.
hope this has helped a little.