Cant access mail admin. Possibly hacked

Cant access mail admin. Possibly hacked

Hi, I just received a spam mail having my domain name as its extension ( admin649@wildwoodsentertainment.com). I've never created any such email id. Upon trying to login to admin mail ( admin@wildwoodsentertainment.com) for the said account, I'm unable to login. I tried to reset the password, but the rest link went directly to admin@wildwoodsentertainment.com. How can I retrieve my mail ID. A quick response is much appreciated as there are sensitive details in the account.