Your possession conviction may be a deportable offense. Show your record of conviction to an experience immigration attorney.
Mr. Shusterman is a former INS Trial Attorney (1976-82) with over 35 years of immigration experience. His response to your question is general in nature, as not all the facts are known to him. You should retain an attorney experienced in immigration law to review all the facts in your case in order to receive advice specific to your case. Mr. Shusterman's statement above does not create an attorney/client relationship.
Conviction for dis con is not a deportable offense. Immigration is governed by federal law, not state. The conviction is sealed under state law. It may not be erased from federal databases. I would be very careful about traveling, and would consult an immigration attorney before going anywhere outside the U.S.
It is sealed and you should be good.
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Sealed is supposed to be sealed, but.... However, your conviction was for Disorderly Conduct, a violation and not a crime. I would seek counsel from an Immigration attorney and carry copies of the disposition when I travel.