If it were ME in this situation, I'd take some extra NSAIDS for a week or two while I get this problem figured out so I don't have to slow down my LP. Of course I'm not a doctor so I could not officially recommend that for you. Try to get someone to get a picture or up close video of the position of the bar on your back/wrists/elbow position while you squat. Then post here or in technique section. That's step #1. In the meantime search this forum for elbow tendinitis as it is a popular topic with many possible remedies