So I'm still relatively new here and had some q's for you

I know the saying goes "your period is regular until it's not" but I'll give a quick background of my cycle. I've been off BC for a little over a year and since then my cycles have been very regular generally 25-27 days. Since TTC I've been starting to spot 2-3 days prior to AF and I notice when the spotting starts, my temps slowly decreases.
Anyways I am currently 10dpo (ovulation was a little later this month) and this morning my temp spiked to 36.87. I have never seen it higher than 36.78. Point of the story, since I O'd about 3 days later in my cycle than the past couple of months, should I just be assuming that AF should be about 3 days later in my cycle too?
TIA
Re: Wondering
TTC #1 since August 2011
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September 2012: Start IF testing
DH (32): SA is ok, slightly low morph, normal SCSA Me (32): Slightly low progesterone, hostile CM, carrier for CF, Moderately high NKC, High TNFa, heterozyogous mutated Factor XIII, and +APA
October 2012-May 2014: 4 failed IUIs, 3 failed IVFs, and 1 failed FETw/donor embryos
November 2014: IVF w/ICSI #4 Agonist/Antagonist with EPP and Prednisone, Baby Aspirin, Lovenox, and IVIG for immune issues. Converted to freeze all due to lining issues. 2 blasts frozen on day 6!
January 2015: FET #2 Cancelled due to lining issues
April 2015: FET #2.1
PAIF/SAIF Welcome!