I had a tubal ligation 9-06 post c-section, reg 28 day cycles, first day 1/29/16, 3 days pink bleeding days 18-21. staining day 23. thoughts?

Probably normal: This is probably a normal variation. A tubal ligation is the best type of contraception available. and very rarely allows for pregnancy. The most likely cause of your symptoms is a fluctuation in your hormone levels causing a shift in your menstrual cycle. There are many ways this can happen, but usually the cycle resumes on its own.