I’m so confused! I’m spotting and my periods isn’t due another 5 days , I got a positive OPK CD22 today I’m 9DPO

I usually don’t get my period until CD 36-39 and today is cd32 could aunt be early ?🥺 or hopeful implanting? I usually feel my aunt coming this is a surprise sorry I didn’t feel any cramps , only feel lower back ache and lower right pelvic ache not sure , Fertility friend is usually spot on w my period date n they have it starting Monday the 9th