elbow pain

Dear doctor,  It started when bouldering. I started to suddenly get slight pain twinges in my right elbow, on the inside (when I stretch right my arm, palm up, it's on the left side). Then I sat down and rested for a few minutes, after which I almost cried out in pain when I tried to lift myself from the chair, because pushing off from the armrest hurt my elbow like a motherfucker.  This was yesterday, and I get shots of extreme pain during very random tasks. I have been trying to determine what triggers is but having a hard time. One way I can make sure it's still hurts is when bend my arm 90% and hold it in front of me (to my chest or to the front doesn't matter) and make a fist. When I just make a fist , I feel nothing, but when I include my biceps in it, it hurts. If I just flex my biceps nothing happens either. If I do it with a stretched arm, nothing happens either. Normally I would go to the doctor/specialist, but I'm in a bit of a strange place atm (just recently relocated to Iceland) and can't really afford it.  I've researched it a bit online, and the thing that describes it most closely is a golfers elbow , but I'm describing it in detail to make sure I'm not selfmedicating (I would take voltaren of brufen) for an injury I don't have. I've applied heat a few times, and also alternate hot-cold, but it doesn't "instantly" feel better like some people say.  I will continue with the heat application for as long as necessary and get myself an elbow sleeve/brace to make sure it stays warm and supported throughout the day. Please, any advice, or confirmation of my uneducated guesses would be greatly appreciated. (I'm not sure what is custom in this forum, but since there's no search option I could find, I hope you don't mind me potentionally reposting.)