March 30 i was in gym on bench press+suddenly the left side base of my skull started throbbing. the pain has not gone away. i can touch a specific spot in the base of my skull (not neck) and it feels like a sharp knife pain. is it occipital neuralgia?

Need to examine: It is not feasible to provide a meaningful opinion without additional history, physical examination and may be some tests. It could be muscle injury or a pinched nerve or cervical nerve root injury. You may take acetaminophen, not more than 4 gm/day, no alcohol. If it does not get better in a week or gets worse, it would be prudent to see a doctor.