oh i've had that too! sorta. 5 years ago (or so) i was climbing, locked off for too long and overstressed my right arm, and got a very irritated elbow. at its worst it was an intense shooting pain at the very tip of the elbow trhat wouyld wake me up at night. it would go away and resurface as a dull ache either at the elbow or in my bicep

still don't know what it is, but if i climb too hard too much too fast it comes back. do take it seriously even if the pain goes away, it could easily come back. warm up lots, light reps, and remember that adrenaline is a painkiller and can mask it.