Fitbit heartbeat

Hey all,

This might be such a silly thought but wondered if youd reassure me, I have a fitbit n like checking in on my sleep n heatbeat, always found it interesting how it increased for ovulation n dropped off as my period came, well being pregnant it just went up n up, but now at 6.5 weeks it's been dropping off all this week, just a few beets a day.. Have you experienced the same?

I should note, I've no reason to expect the worst, no bleeding etc, our heatbeat scan is next week n my brain can't help over think it.