Hi ! My Name Is Pam. And I Am 40

hi ! my name is Pam. and i am 40 +. last month i had my period on 20th Sept for 4-5 days as always. but yesterday i had a light bleeding in the morning and i experience the same thing on this morning . i am confused and worried . the bleeding was very light. in the sense that it is not red ( red). could you please tell what could be the iproblem. ? please by the way i m not married
i look forward to hear from you soon.

thank you

Pam