I can’t think of any negatives Peanut, the only thing the GP might want to do, is a blood test to check liver function. You will more than likely need a private prescription, yes. I think I pay £186 for 3 months supply from Boots.
It is completely non hormonal, so there shouldn’t be an issue from the cancer perspective.
I think for the sake of undisturbed nights, particularly when you work a high stress job, it is a product worth exploring.
Good luck.