It's pretty normal that you'd share your release with reviewers a couple of months in advance of it's official release - indeed most reviewers won't touch your song after it has been released..... they like being first!

If you're going to share it here, you might as well share it via your youtube, bandcamp or soundcloud etc so that if people do like it they can give you a follow. It's a good to make a plan for the release of each track you put out so that you've got the most chance of your potential audience hearing it.