Cyclical Neutropenia

Developed condition 3 months after giving birth to my son. Became very sick twuce with 0.0 neutrophils. Started GCSF however still had low counts <0.5 and was hospitalised every few months.
Started 20mg Methatrexate in November 2016 levels not dropping as low and no hospital visit but neutrophils can be low for longer periods of time.
Looking for advise re treatments and medication options.