Lost Yahoo account access

Hello,
My previous Android Samsung Galaxy s6 was stolen about a month ago, & lost access to my Yahoo account. Im not sure I remember the email or password attached to my Yahoo account. My Samsung Galaxy s6 Android phone # on that Yahoo account is <removed by moderator>. Can u help me find & access my Yahoo account? I was on a Yahoo site very similar to the Hangouts / WhatsApp site, of which I forget but it might have been a site like.yahoo messenger, or one of those knd of apps. I was communicating on the yaoo site with a <removed by moderator>, I believe. Can't locate her now to resume communication with her. Please help. Thank u.