Temperature drop??

Holly

I've kept up with temping despite 2 very dark-lined BFPs, but this morning it dropped by 0.8 degrees. Not below coverline but still a big drop. I was terrified that this was an early sign of a miscarriage so I took another test and it was a BFP even darker than the last. Has anyone else kept up with temping and seen a drop like this? Should I start panicking? (Even more than I already am) my heart will break if I lose this little bean