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Don't think it's caffeine related. Drinking water and have a cool flannel on my head. Dc in bed so I'm in a dark room - phone brightness is on minimum and this is hurting. Have routine gp appt on mon so will mention it then. I'll go pharmacy tomorrow as it's driving me to tears, can't have asprin as on blood thinners
If it's blindingly bad and painkillers aren't touching it then you may need to go to A&E. Without wanting to panic you my aunt once had a blindingly bad headache that wasn't shifting and made her feel sick. She took some aspirin (only painkillers we could find in the house) and lay down in a darkened room. She was bleeding into her brain and almost died. I was there and called the ambulance in the end when I found her crawling across the landing but had initially thought it was just a bad headache and nothing to worry about. If it's the worst headache you've ever had them it's worth getting checked over.
I normally avoid hospitals like the plague but once dp home I'm going to ring 111. Had all sorts of painkillers (have a few medical conditions so have strong painkillers) and nothing is taking pain away. Even oromorph. It's bad but obviously it's not had enough that I can't talk or type this.
I missed the thinners. Op you could be bleeding in to your brain, minutes will make a difference. A and e now and tell them as soon as you get there about the thinners and the intractable pain. Go mow!
Yesterday you were describing pain that would not resolve, aversion to light and you are taking a medication which puts you at higher risk of bleeding in the brain. It may be migraine, it may be sinusitis though without a cause I'd question that if it could be a brain bleed. Just go and get seen by somebody who can assess you properly.
It does sound like migraine and I probably would wait for GP appt too but then I am a crazy person and I've had so many things wrong with me I am abnormally casual. Most people would be in A&E by now or at least phone. Good luck with the migraines if that's what it is (and 1 dose of medication diagnoses if it is), I have had them for 23 years now but they are less frequent and less severe now phew! I hope you post an unpdate tomorrow!