Contact your registry, they may not have sent it out to your examiners yet, and as long as you're not under some final registration deadline, they may let you resubmit a copy. Otherwise, contact your supervisor, maybe he/she will contact your examiners with a corrections list.
I'm sure everyone finds errors in their work after submission. I'm reading a chapter of my work that I never intended on copy-editing again, and sure enough, I'm finding more errors.