Hi Doctor, I Am 31 Years Old. I Have Been

Hi Doctor, i am 31 years old. I have been having menstrual irregularities for years and i thought it was finally corrected when it became regular for the last one year. However, last month and this month have been different because i now see some light brown discharge instead of my menstrual flow. I'm worried because i feel something is wrong. I'll really appreciate your help and advice. Thanks.