Expert answer:
1 - I'm breastfeeding and my period has not gone down, is this normal?
Yes. Usually while the woman is breastfeeding, menstruation usually does not come down.
2 - How is menstruation breastfeeding and using contraception?
It can be without menstruation, it can come regularly, just as it can come irregularly (several times a month or it takes well over 1 month to go down.