Alittle confused!

Ok so I was 25 days late for my period I go buy 2 test get home yesterday day about to take em and boom blood.. so I was like no need to take test I am not pregnant but that is the only time I bleed I changed 3x yesterday the first one had a little blood but the rest had none and after sleeping last no blood on that one either.. Has anyone done this or am I just crazy..