Last month was our 6th month trying, 1st month using OPK's. According to the tests I O'd on CD 17, but started my period on what would have been CD 28, so I had a shorter than normal luteal phase. My OB said they wanted to run blood tests to check hormone levels 8 days after I ovulated.

I got a a darkish, but not positive test, on the evening on CD 11 and then nothing the next morning. It had been getting progressively darker each day. I called, explained, and the had me scheduled to go in tomorrow for a blood draw. I asked if I needed to keep testing and the nurse said no. Well, I did anyways and got a very obvious positive on CD 15. Of course that lands the test when we are going to be out of town, so they just moved it up 2 days instead of having me do the blood tests elsewhere.

Any one have any advice or experience with this? I just don't want to waste a month or a procedure, even if it is a simple blood draw. I don't want to have them just tell me, well this is what we think, but it could be off because we did test early, etc.