Gonna say that you've done a great job explaining all of this and taking care of yourself. You're working with doctors who are digging deeper to figure out your pain. Are they saying 'bicep rupture'? That's an actual condition. Years of wear and tear can cause it and it often happens to weight lifters. I do think that normally causes mishape of the area but has a bulging area too, do you have that? Anyway, you sound to be working with quite an expert and I'll be curious what they determine from the second mri. Microtears that are harder to see? That could be the situation you are dealing with. Did they tell you to do anything? Ice, nsaids, anything? I hope that you don't need surgery and can heal on your own but we'll see what they say. Physical therapy can do wonders as well. But I think you probably have a few months of working this out, unfortunately.