+OPK, mid-cycle spotting, no thermal shift

[Cmomma]

Hello ladies. I've been reading for months, but rarely post. I have a tricky question this time and am hoping that someone has an answer.
I am on CD 17, usually O on CD12 or 13. I had +OPK on CD 12 and 13 (though using Answer dip tests, and after reading reviews I wish I never bought them!). I usually see the temp rise the day after and sometimes even day of +OPK . This cycle, I am now 4 or 5 days passed +OPK and still haven't seen a thermal shift. I am on progesterone and don't know if I should take it. I don't want to prevent O if it hasn't already happened, but I don't want to not take it and possibly interfere with implantation. Here's the weirdest part. I started spotting on day 15 and it has continued day 16 and 17..not even enough for a liner, just when I wipe. I have never, ever had mid-cycle spotting. So I called my doc to see if I should start prg and she just said come in day 21 to see if prg is absorbing correctly. So not helpful. If I take it and it is in my system, she won't be able to tell I didn't O, right? How will that answer my questions? Any advice? Ideas why the spotting?

 

[Briss]

positive OPK just means you got LH surge, with no temp shift it's quite difficult to say whether you actually O, maybe not. I would probably not take progesterone this cycle so you could do 21 day blood and confirm one way or the other. spotting is a tricky question, if you'd had temp shift, I'd say possible ovulation or even implantation spotting (I never had it myself but quite a few people here seem to have), without temp shift, I do not really know what it could be. continue tempting and BD, maybe your O is being delayed for some reason

 

[Cmomma]

Thanks. I decided not to take the progesterone, so I can get better answers from the day 21 test. Today is day 18 and I'm still spotting and now some cramping. My thought at first was also ovulation spotting, but I was confused since I hadn't seen a thermal shift. I have had implantation spotting twice, but I really thought it was too early for that. Does anyone know if it is at all possible to ovulate and NOT EVER see temp rise?