retrieving emails from a mass delete yesterday


New Email
Hi hoping someone can be of help?
I just bought a new laptop. And i was inputting my mailbox. On microsoft hotmail I flagged 4 items and tried to delete the rest of emails in my inbox (17,000 of them). The task happened but also deleted my flagged items which i needed. Tried searching in trash can and deleted folders. Has only a proportion of emails there but not what I want!
Can anyone be of help? thanks