I deeply open kissed someone, and I have cavities but no sores/cuts. I don't know if she had cuts/sores. What shud I do/shud I be concerned?

No worry vs. No kiss. Kissing is universal in America, and doctors don't worry about kissing among the American public. The rule is, if you are sick (with mono, strep throat, a cold, the flu, etc...), don't kiss anyone until you are better. That means trying to avoid passing your illnesses to others. Those who worry about kissing should not kiss, and those who kiss should not worry. People usually chose the latter.
Stop worrying. If you have cavities you should get the teeth restored/fixed. Other than that there isn't much to be concerned about. Although, if the cavities are deep your breath probably isn't great. .