Temp drop below cover line at 5dpo?

[MUMOF5]

Anyone have any ideas why this has happened? This morning temp was really low, I had a good sleep and took temp at normal time, just worried that it's dropped below cover line. Any advice or anyone that's experienced the same would be greatly appreciated x

 

[SarahA]

This is very normal. It happens to me every cycle on either 4 or 5 DPO. A few days after ovulation, your body has a second surge of estrogen. That's likely the reason for your low temp. You might also notice fertile-looking CM, as well. Your temp should rise again tomorrow or the next day.

And just a side note: I don't know how long you've been temping, but in my experience, this bit of information has kept me sane: One weird temperature is rarely indicative of anything. With BBT, you're looking for trends—a sustained rise or drop for three or more days. So try not to freak out if your temp seems off one or two days. It's totally normal.