Reverse-Cycling, Domperidone, and Periods

[MamaLump]

Starting at 6 weeks pp my period came back. Every 4 weeks, not quite clockwork, but fairly regular. In December we went to visit the inlaws and DS who was 7 months at the time reversed-cycled. A week later I had my period as normal. I also started domperidone late December. Well, now it's February, and no period. DS is still nursing all night and I'm still taking domperidone. I pump about 16 oz during the day. He doesn't even really nurse during the day even on the weekends (he's at daycare during the week). Could the reverse-cycling coupled with pumping and domperidone keep me from ovulating and hence no period?