Did anyone experience this freakish thing in early pregnancy?

I’m 4+3 based on my LMP, and I got my first positive on Saturday.

My line progression is good and is continuing, but I’ve had some on/off spotting since Wednesday night. I experienced AF-like cramps on Thursday morning that left after an hour.

The spotting has stopped at this point, but I’m very nervous. Here’s my gross pic and my positives:

(That was this morning, at its heaviest. It has since stopped)

(The first is yesterday night and the second two are this afternoon)