Uy, ang best thing talaga is to go see your doctor or take a proper test sa clinic, lalo na important ito dahil mayroon kang baby pa, kaya kailangan mo ng professional guidance right away. A few of us mums have been there, six days delayed can mean different things, and it's really hard to know without proper confirmation. Hindi lang pregnancy ang pwedeng mag-cause ng delay, so please don't stress yourself pa more. Get checked properly, okay? Rooting for you, mama!