Hi,

Being in heat is stressing for cats.  Don't know your circumstances, but is
there a reason why kitty isn't already spayed?

At any rate, because the cat wasn't fixed before, you should get your cat
spayed.  Just phone the vet and ask when would be an appropriate time.  Some
will do it while the female is in heat, others will suggest you wait until
after she's finished her current heat cycle.  

Let us know what happens and good luck.

She is just now 6 months as of 3 days ago. We usually get them done about
at 6 months not before.
    I have not had a female cat for over 8 years so it is my stupidity for
forgetting about them going into a early heat.   Limo was handled by my
elderly mother so I had no idea when she was done but according to mom and
the vet.   Limo never went in heat before she went in at 6 months.  The last
female cats that lived in our house from kitten to adult was almost 20 years
of age and passed away this year.  Her sister was 18 when she died  and her
brother was 17.  They all went in at 6 months.
    To be honest this caught me off guard with everything going on here
this was the last thing I was thinking about was a possible early heat.  I
am only human and allowed to make mistakes.
   The rest are all inside cats and were fixed at 6 months of age.  The
appointment was already scheduled for this coming up week; in fact this
coming Monday morning at 9 am.  That is why I said "Oh great this is all I
need now "in the header

Now If I am correct a first heat last for about 3 or 4 days up to a week.
Right?  That was the help I was looking for on what to expect