Advise PCOS and endometriosis

Hi there , so .. it’s been a lot to take in mentally. I’m in my teens now so fertility isn’t my biggest concern but it does lume in my mind ... my biggest issue at the moment however is that I am so so tired majority of the time. I’ve never felt this fatigued and I was wondering if there are any things I can do to try counter this tiredness ! In my final year of school and really need to work but the tiredness is just slowing me down.

Any advise or pep talk would be much appreciated 😕 ( less than a month ago I also had a large cyst removed from ovary along with majority of the ovary )