O'Shea says the left side of her body has been slightly affected. Photo / InstagramO’Shea says the left side of her body has been slightly affected. Photo / Instagram

The actress-turned-social-media-star said she started to feel “off” six weeks ago during a work trip to LA. Photo / InstagramThe actress-turned-social-media-star said she started to feel “off” six weeks ago during a work trip to LA. Photo / Instagram

Fellow Home And Away star Johnny Ruffo was also diagnosed with brain cancer. Photo / SuppliedFellow Home And Away star Johnny Ruffo was also diagnosed with brain cancer. Photo / Supplied