I have a 1cm cyst on my left ovary and 2cm cyst on my right ovary. I am over a week late for my period, are they the cause of it

Most ovarian cysts are normal and harmless but many women experience fertility issues if the cysts get too large, or are the symptom of a bigger issue such as PCOS.

You may want to wait and take another pregnancy test.  The cysts could be a cause but you will not know for sure, wait to see if you are pregnant or not.  How long have you had the cysts?  Is your menstrual cycle usually on time despite having cysts?

 Working toward preventing cysts in the future will help  you to rule out ovarian cysts as a culprit if you miss your period again and your are not pregnant.

 Ways to prevent ovarian cysts:

Reduce excess estrogen by using a natural supplement called DIM, avoiding soy products, eat only organic foods, avoid products that contain mineral oil, avoid drinking water from plastic

Balance hormones using herbs such as Maca

Increase Progesterone if you find you are progesterone defficient

Disslove and reduce cysts using systemic enzymes and Castor oil packs

Best Wishes