I am in a crappy situation. One professor I was counting on to write a good letter apparently doesn't like to write. He is avoiding my phone calls and is never available in his office. I get the hint. So that leaves me with a missing LOR. When do these things have to be sent? Along with secondaries? I believe most DO schools require two science LORs, leaving me needing one more. Do you guys think I'll have time to take a science course in Summer (May/June) I and procure a letter that way without hindering my chances of admission?