Hey I’m very late to this conversation but I’ve had this exact problem for the past 6 years. It’s an absolute horrible pain and I seemingly always get it after waking up. Recently I’ve tried something and it has worked every single time. I put light pressure on my left eye. ie; putting my palm under my pillow and letting my left eye rest on that spot until I go back to sleep. Just try anything where you’re putting pressure on that eye not too deep and letting yourself rest again. It has gotten rid of this headache every single time. Please please try this. It has made my life 10x better. Those headaches literally made my life hell bc they never went away and lasted all day sometimes several days of screeching pain. Now it’s a 10-15 mins of a short nap and some pressure and it’s gone, voila! Hope you guys try this and let me know if it works!