Pre-O Temps flat-lining?

[Ask4joy]

Hi ladies - While I have not been diagnosed with PCOS, my doctor suggested a myo-inositol supplement (Pregnitude) to potentially help with my acne and other PMS/cycle related symptoms. I am 33 years old. This is my 3rd month tracking my BBT and first month taking Pregnitude (started CD 3) and this month I've noticed a major difference in my pre-O temps. For the last 9 days my BBT has been very stable, nearly exactly the same every morning. The past 2 months pre-O temps were more erratic. I am on CD 15 and was expecting to see a temp drop today (the last 3 cycles I've ovulated between CD 15 - CD 18) but my temps have remained steady.

Anyone else taken myo-inositol and notice more stable temps? I also had a CP last month but my period was normal. Not sure if that could effect anything?