So today I finally tracked down one of my LOR writers who hadn't responded to my email. It seemed to me like he was trying to avoid me, but I went ahead and asked him if he'd gotten my email regarding the LOR and he hesitated before finally saying, "yes" and then he just walked off quickly without even giving me a chance to say anything. I worked for this guy for 3 years. I have no idea if he's going to write the LOR or not or even if it's going to be any good. I'm currently trying to find a last minute replacement.