Could this be my rainbow baby?

I tried taking ovulation tests but I missed when the peak happened. I'm guessing I could be anywhere from 15-18dpo because the only time I had sex was on May 6th.

I've taken a test each morning for 5 days. They got noticeably darker each time except from day 3 to 4 of testing. Those two may have been switched around because my husband knocked them off the counter lol

I keep trying to tell myself that maybe the test is just more sensitive, but it seems like a lot of other people have much darker lines by the time they're passed a missed period.

Anybody have a similar progression and have a successful pregnancy or miscarriage, or maybe chemical?

I haven't allowed myself to celebrate yet lol.

Any insight, positive or negative is greatly appreciated.