I’ve got something the same, I was just getting to all new RM’s with bench and DB curls. Then my elbow started hurting so bad, felt like tennis elbow or tor something, that I had to stop for about three months. Sucks lost all my gains. I’ve just started again but the outside elbow still doesnt feel right, like maybe it healed wrong. Any lower curl movements and I have to stop. Kills some workouts.
So what ever you find out at the Doc would be great to know.