BBT Temp Dip

Hey guys! I’m new to bbt charting - just started this month! I’m 12 dpo and I just had a temp dip this morning (0.3 degrees C, or 0.55 degrees F). I know this most likely means that AF is coming, but I’m just wondering could there be any other explanation? I was feeling sooo sure that this was my month! Did anyone else experience a temp dip and still end up being pregnant?

I know I’m grasping at straws here and I should just wait it out but I’m just so anxious to know!

A little update on this: I didn’t sleep very well last night and I took my temp this morning at 5am (I usually wake up and temp at 8:30)... I got up, went pee, went downstairs to grab a light snack and went back to bed. I woke up at 8:30 and temped again and now my time is muchhh higher... in fact is actually went up about by .1 celcius or 0.3 Fahrenheit compared to yesterday.

Which temp would be more accurate?