I had my cycle cancelled again on 5th October due to a cyst (the second one this year). I was inj with bruserlin to try and down reggulate which I didn't manage due to the cyst. It's now 22 days since I stopped alll medication.
Sounds like your body may be just missing a month which can happen after cancelled cycles. If you bled while on Buserelin the af is usually 4-5 weeks later but if no af then it´s just a wait and see game. It will come eventually.