My experience is that you can get a certificate of creditable coverage while you are still insured. My experience is also that you can be insured under two health policies at the same time. You really should be posing these questions to a good insurance agent. He or she might suggest you consider travel medical insurance, if you are not already doing so.
This information is subject to the disclaimer below and is not intended as legal advise.
This is general information based upon limited facts, should not be construed as legal advice, and does not create an attorney-client relationship. The author is licensed in Indiana and Ohio attorney only.