Missed period

Tanya

Good afternoon ladies I'm 12 wks post-op open myomectomy. I didn't get my period for October was due between Oct 9-12th and nothing did 3 test... all negative. My last period was Sept 14th. The last 2 periods I had were normal 3 days and came when they were suppose to. Have any of you experienced missing a period when you had your procedure done?