Obviously you would not be happy about it, but the Navy is not to blame for you needing appendix surgery and OCS date CX. Your Surgeon has "cleared you" (probably for normal activity), but OCS is far from normal. The medical 'deecision makers' above your surgeon, have determined that you may need more healing time to ensure you're not exposed to the rigorous physical activity too soon. They haven't PDQ'd you, so relax.
The problems with your job & apartment are a PIA, but it's neither your fault, nor the Navy, so no use getting down over it. Once you're into the program and flying, this may be recalled as just a small bump in the long road!
Think of the horror if halfway through giving your DI his 50, your belly split and your gizzards hit the deck!
BzB