Hi everyone, I’d really appreciate some help interpreting my BBT chart this month as I’m feeling quite confused.
I usually ovulate around cycle day 19, but this cycle looks much earlier than normal. Natural Cycles is marking ovulation as cycle day 13, even though it excluded my temperature that day, which was 36.72.
What’s confusing me is that on cycle day 16 my temperature dropped to 36.44 and I also had lower back ache. Then on cycle day 17 I had a very large temperature spike up to 37.15 (highest temp I’ve ever had since bbt’ing past 7 cycles), and temperatures have stayed higher since.
One extra factor is that I’ve been sleeping with a hot water bottle recently. I slept with one on cycle day 13, but from cycle day 14 onwards I deliberately stopped using it to see how it affected my BBT, so I’m not sure if that may have confused the temperature readings earlier in the cycle.
Based on BBT patterns, does it seem more likely that ovulation happened around cycle day 16 rather than cycle day 13? Cycle day 16 would also be closer to my usual ovulation timing, which is why it feels more plausible to me.
Any thoughts or similar experiences would be really appreciated. Thank you.