lost emails

Hi ... I had a text message to my phone, with my ex husbands email, added to mine, with a Microsoft code, which I did not enter. my outlook would not let me sign into my account with my password, so I changed my password. But since doing so I have lost all my emails, which has never happened before on changing a password. can I get these emails back? or have I lost them for good? it did state welcome to your new outlook, which has never happened. please help. Also some emails were from my ex husband, if he blocked me, or deleted me, would I still lose them messages?