Hello, I would be happy to help you with your question.
If you are late for your period, and a test is negative, then you are not pregnant. It sounds like you are having cycle irregularity and 'galactorrhea' which is breast milk production. A common cause of this is elevation of a hormone called prolactin
. You need to see an OB/GYN to get some labs drawn and to review what exactly is going on!
I hope that this helps and good luck!!