BFP but AF symptoms

I’m a worrier. And I’m really worried about baby. I got a BFP at 9 dpo, and the lines have gotten darker ever since (though, the last two days, you’ve had to really squint to see the difference. But, they’re still dark positives. Am wondering if I’ve just reached the point where the line can’t get darker)

I’ve been having cramps for the last few days, but they’re always super mild & go away quickly. Today, the cramps are a little more severe (still pretty mild, though.) and it’s the day of my expected period. I don’t know if it’s a mental thing, or a baby developing thing, or a losing baby thing. Anyone else experienced this and everything turn out okay? Praying for a sticky bean

BFPs from 9, 10, and 11 dpo