Post patch amenorrhea

Can anyone shed some light on this for me? For off the patch January, had regular period then that was it! Last two months I have had what my sister called an "old period", which is just the light brown spotting, started right around the time i was due for my period but definitely not a true one. Fwd to now, I have two days of the 10 progesterone pill treatment and just want to know what to expect.  Heard and read a lot of different experiences. Really want to know when I could expect to ovulate?? 😊