If you don't have a specific reason, then you won't get an expedite. They are only given for urgent situations, not just because you want to jump ahead of everybody else in the line!
"To request a review for expedite, please submit a scanned letter (or statement) to NVCExpedite@state.gov from a physician (or medical facility). The letter must include the physician’s (or medical facility’s) contact information, and declare a life or death medical emergency exists"
The link above gives you the timeframes, it's updated regularly. Good luck - and please do fill in your timeline when you get a moment to help other EB applicants going forward. Thx.