Hello, I would be happy to help you with your question.
If you are 4-5 weeks late and the pregnancy
test is negative, then you are not pregnant. You are likely not cycling because your are not ovulating. This is not typical coming off of the pill as there usually is not a significant delay in your period. The 'leaking nipples' is a possible clue to an elevated prolactin
level which will prevent you from ovulating. You need to schedule a visit with your OB/GYN and tell them about the nipple discharge
and absent periods!!
I hope that this helps and good luck!!