Definitely not too late to get your app in. As already said a lot of programs haven't even started sending invites. Have you done any anesthesia rotations? Do you have or can you get an anesthesia LOR quickly? Also be prepared for the question of why anesthesia and why applying late (personal statement material), you want to really convince PDs you aren't applying late because you decided last minute that you weren't as competitive for your 1st choice as you would have liked so you decided to go for #2. Obviously that scenario happens and is realistic, PDs know it, but you want to sell yourself as not "settling" for anesthesia. Good luck