Blood taste??? :( *A little

Hi so I had protected sex then I had my period (6 days late) because it was pretty heavy for 3 days then 4th day spotting. *negative tests as well

Ive been experiencing this weird metallic taste since before my period and until today. (It doesnt affect the food/water) I just taste it right after.

its not pregnancy right? if not, what else could it be? how to make it go away 😭 I definitely believe that what I had was my period because it was red & it was pretty heavy made me change 3-4 times a day. It lasted for 4 days

had protected intercourse (aug 22 & sept 12)

period due: sept 15

period came: sept 21