I'm 41 years old had my tubes tied 11 years ago. i was wondering what this pink menstrual flow was. it was normal color the first two days then pink?

Probably period: Pink equals old blood. It sounds like that was your period although likely not a normal period for you. It is typical to have an "off" period every now and then. This usually corrects itself over the next few cycles. If it continues see your doctor to discuss cycle regulation. Birth control is very effective at regulating the cycle and preventing pregnancy.