So... I've had a persistent headache for just over a month now. It causes mild nausea. All the time.
I've been to my GP and they sent me for a CT. This revealed that I'd had a bleed in my basal ganglia. It's not an ongoing bleed. The radiologist reports that this is unlikely to be the cause of the headache/nausea though. My GP has put me in the queue for a consult with a neurologist and this will likely result in an MRI.
But this is in the public health system so I'm looking at a few weeks wait. Until then... I have new drugs to manage the nausea and headache.