You have skin laxity with visible relaxation around the mouth and jowls at rest as well as some aging changes in the neck. The only procedure that will definitively give long term correction is a lower facelift that addresses the again changes around the mouth as well as the jowls and neck. ...
It sounds that your brow may be a little low. That can be repositioned and there are various procedures that can be used; even non-invasive ones.
The lower lid veins can be treated with either lasers or IPL. Face-to-face consultation would be ideal to make the best treatment...
I would suggest 1 month before this as it will dramatically dilate the blood vessels in the face, cause swelling, and in the first 3 weeks could even under rare circumstances cause a hematoma.