Hi Dezrad
Can you tell us a bit more about yourself - how old you are, and what your periods were doing before you started HRT - have you skipped any yet, how long between periods, heavy light etc? Also is it Evorel sequi, conti or just Evorel 50 (this will depend whether you are peri or post meno and whether you have a womb or Mirena)?
Patches usually work within a few days - depending on your situation - but sometimes women react negatively to the progestogen part of Evorel (the combi patches) which can cause pms type symptoms.
Hurdity x