I received strange emails from my @icloud email address that I didn’t send

Hi nanda245m

It appears that you've had the opportunity to review: If you think your Apple ID has been compromised. If you're concerned that an unauthorized person might have access to your Apple ID, that resource has the best steps to take in order to gain control of your account.

If you completed the steps and think your account might still be compromised, reach out to Apple Support directly so they can look into this with you further. They can be contacted here: Get Support, or by calling the most applicable phone number from this list: Contact Apple for support and service.

Best regards.