Missed period help need advice

Hi there :) 

i had a biopsy done about 4 weeks ago now and period is late am wondering is this normal?am having abnormality removed in august time but just confused if normal not to get a period :/ many thanks ladies xx

Hey Mazda, I had my letz in March/ April time and bled a week after for around a month. I haven't had a bleed since, in getting so worried.  Going to the drs tomorrow. Anyone else having or hav w had the same problem.