Beth, I just went to the local medical centre which had a 'gribbles' pathology attached...and my Progesterone and Lutenizing hormon levels were tested with a BT on that day...I went back in 2 days time with the results...and was then given a referral to a Gyno.

I don't think there is any limit to how long after you come off the pill.

I was on my 6th cycle off it, but it wouldnt be a factor at all.