Four days is not nearly long enough to show a change. Some guys go months before they see growth. The first thing you have to do is develop some patience. PE is not a quick fix. Many guys, especially those who are circumcised, do have to stretch the skin before other things can happen. A little sore is good. If the whole penis is sore, it’s probably skin. If the base is sore, it’s probably ligaments. If it’s both, then you’re probably on the right track.
Stretching in five directions and also “around the world” helps loosen everything. Pull up toward your head, down toward your feet, pull left, right and straight out. Do each for 30 seconds to a minute gripping below the glans. You may need a grip aid such as a piece of paper towel, cloth or latex to help maintain your grip. Then, after you’ve done the five way stretches, pull it to one side and rotate you penis through a circle. Go around a few times in one direction, then reverse. The repeat the whole process for two complete sets.