You're stuck... here's why:
I thought COMLEX 2 was so much easier than COMLEX 1 (scored a 99%ile on 2, 93% on 1), and studied much less (like most of my counterparts). If you can set up easy rotations in July/August, you should do okay...
Psych isn't terribly competitive whatsoever... I was interested in psych (as a backup to EM, but never applied or researched it thoroughly), and did a second month of Psych as an elective. The attending told me "if you have a heartbeat, you'll get an interview." Now that's not to say you could get into Columbia or Harvard, but most programs I think would be open to having DOs...
that being said, it doesn't sound too important to do well on your board scores to get Psych interviews...
Q