Re where you are in your cycle, I don't think it really matters.
To be honest, I felt a bit of a fraud sitting in there, telling her about my regular periods and bang on normal cycle length etc.
Often I think women go to try and regulate their cycles or to try and get a period if there are very irregular- also I think quite a few women/couples go there before/during the IVF process. They asked me a few times about assisted conception/IVF
I cannot believe it's been a whole 15 months since my MMC- I try not to think about it too much as it really makes me sad
and tearful.
Yes I've fallen pregnant twice before with none of this stuff- no planning, checking dates or temperatures or cervix positions!
But, it's just not happening again yet.
I'm sad thinking about the fact that Christmas is only a few months ago, the 1 year anniversary of my due date will be just before then.
Last Christmas I was sad as we should've had a newborn baby and also I reckoned I would've been pregnant by then (keeping the hope alive!)
This year I don't even want to think about- not only no baby from all our efforts over the past 14 months, but also quite likely to not even be frickin pregnant!!
Mother Nature is a complete bitch.
Also, in the back of my mind, I know I'll have to get pregnant in the next month or two if I have any chance of having a baby before I'm 40.
This time last year I was saying it needed to happen so I could have the baby aged 38.
Wonder where this will all end?
You're right about temping- I am so glad that I started doing it again- did it first about a year ago, for several weeks or so. Then started up again in July. It does help give me a sense of control too- I know for sure if/when I have ovulated, you don't get that with OPKs.
I used the cheap OPKs from time to time, bought my first ever batch of them a week or so after finding out about the MMC.
Bought the expensive CB dual hormone ones at the start of this year and used until I ran out of sticks- got the right smilies to indicate my peak days and we DTD lots. Am thinking now that DH's sperm issue is probably the reason we never caught- and I probably was ovulating etc.
I just chucked the device in the bin after a few months & feeling frustrated! 
So since March I've been trying to chill out and not think about TTC (ha ha yeah right!)...then I swung the other way when it hit the year mark in July. Got the Ovia app back & started temping every day, and read the book 'Taking charge of your fertility'- it gives me something to focus on.
Maybe doing all this makes me more stressed about it, but I've come to the conclusion that we don't have any more time just to float along saying "it'll happen one day"- my next birthday is the big 4-0 