I need some help, or opinions. Either is fine.

I took 3 pregnancy tests this morning (I forgot about the third one) and, they were negative.

That was at 11am. Fmu.

Then, at 3:30 I took one more and it was clearly positive. No denying the second line. I'd post it here but it says no pregnancy tests. Smu.

Then I took another at 6:30pm today and it was negative.

Should I trust that one positive?? I mean, there was no denying that second line. No squinting or anything. Has this happened to anyone else?? I'm not sure how many dpo I am. I'm scared it's a false positive 🥺😢