Post pill amenorrhea blood tests

[Zoey36]

Came off the pill (Dianette) and haven't had any periods. Doctor wants to test to see if there's anything underlying such as PCOS. I've been asked to go for a blood test to test certain hormone levels. From what I've read, there are best days to do this. E.g. looking at LH and FSH, you should go around day 3 of your cycle. I don't know when to go as I'm not having periods so don't have a day 3 to go on?! The doctor didn't specify a day though. But I dont want to mess up the results by going at the wrong time.
Has anyone been in this position? Can you help me ? Thanks.

How long have you not had a period for? I had this, secondary
amenorrhea, I had two months with no period, was ttc, and not pregnant, they were going to put me on fertility drugs, but I found out I was pregnant at the third month, I'd already seen a hospital consultant who then went on to manage my Pregnancy as they were concerned about dates and couldn't date accurately.

I just had the blood test, there was no question on dates, the doc didn't mention it either, no issue with hormones, and I was confirmed as not pregnant by the blood test, a scan and the consultant examining me. I was ovulating, simply not bleeding, which no one was expecting.

The doc would have specified a date if they thought it was important so just have the test.

You can have the blood tests done according to calendar days so I used to go on the 3rd and 21st of each month.