Hello! I gave birth at the end of November. After childbirth, lochia (…

Hello! I gave birth at the end of November. After childbirth, lochia (afterbirth discharge) flowed gradually, eventually ending, then transitioned to a yellowish hue and completely decreased. Immediately after that, today they appeared as regular menstrual flow. I am breastfeeding. Can you tell me if this is normal? Are these menstrual flow? I have an appointment with a gynecologist after the holidays, I'm worried.