one days tests. day test looks positive? if so, can be so fast gone?

Hanna
Hi all, took this yesterday. Melon pic is morning, up pic (looks pos to me) is 15:30, and down is 21:00. Middle is darker clearly. But can it be so fast gone? Only couple of hours? Now very faint line anymore. Also day before very faint. 
Last cycle I got also very fast peak. Read some have had two days (?!) positives 😅 last cycle had horrible cramping, now just a small rip at 4pm on that day. Am I weird individual or did I even O.. anyone else have like this?
Thanks♥️