Don't delay. Very dumb. You're shooting yourself in the foot for no legitimate reason.
The match rate for American graduates falls to around 50% after just one year. Of course, there are confounding factors, but why would you risk it? Plenty of medical students take Step 2CK/CS during clinicals with no trouble.
In fact, you should have Step 2CK/CS done and dusted by September, since more programs are making it an application requirement for IMGs. You're way behind the curve and you need to catch up. Again, this reflects as poor planning.
I'm really sorry if this comes across as harsh, and I know it's a stressful decision, but that's the unvarnished truth.
