I had a similar experience some months ago.

The throbbing pain starts from the back of my head just above the neck, n travels over to the front on my eye socket.
Only happens when I fully exert, either pressing or pulling. Feels exactly like a throbbing migraine.

I deduced it to a pinched nerve along the base of my neck/upper spine. Around the back collar area. I remembered a few times I used to lie down on carpet propped against the sofa seat to watch tv. Fell asleep in this position too. The back of my neck would be resting on the edge of sofa base.

Once I stopped lying down like that. The pain went away after 2-3 weeks.

So take note of your body composition. ie. how u sit, how u sleep. It may very well be the cause for your pain.

Take care.