Hi,
This forum is not Microsoft support; it is a form of users' mutual support. Forum members have not an access to your account so may give recommendations only.
Unfortunately, it is not possible to recover access to your account without filling a form with as many data as possible. Microsoft needs many enough information to confidently match you and your account.
Please strain your memory and give as much data as possible. Many scammers try to hack someone else's account so Microsoft just cannot take anyone at their word.
Or you may contact Microsoft support via https://support.microsoft.com/contactus/ page.