Personally one or two week is too little in my opinion.
I’d advise waiting a month at least. We all heal and fade at differing rates dependant upon how active our immune systems are at attacking the ‘foreign invader’
I’m really pleased to hear how happy you are so far. That’s the best possible news after you’ve waited so long, I knew you’d be happy with Paul, there are no better practitioners anywhere!
Added Density and use a darker pigment will both darken your treatment but my advise is to leave it solely to Paul’s discretion mate and take advice from nobody other than him or Simon.