the only thing you can do is facilitate healing via supportive measures. this means:
1) eat regularly, and a little more than usual, with a bent towards protein.
2) keep the area clean, free of debris, bacteria, excess moisture etc ie regular showers and cleaning with a soap substitute and water (soap will dry it out and potentially irritate the area) <<<<<MOST IMPORTANT. INFECTION WILL DELAY HEALING FOR AGES
3) make sure enough blood is going to the area ie no tight underwear/jeans
4) keep the area at optimum temperature ie dont let it get too cold since thatll impac blood flow
5) dont disturb new tissue ie dont bang your dick around everywhere ruining your stitches/new epithelium. this includes masturbation and even "taking a closer look" pulling everything this way and that.
follow my advice and youll experience vastly decreased healing time ie maybe be ready in 2 weeks, since the 4 week figure is usually ballpark for the average person, and overstated
you must now post pictures and a story. thanks