Spotting at end of period

I usually get a normal flow for about seven days. With the first three days being the heaviest and it dwindles down to spotting on the seventh day. But then the spotting has been continuing on to about eight or nine day of period. Is this normal? I don't know of I should log that as my normal period on Glow or to log it as spotting. I logged it as spotting and glow told me to go see a doctor.