Hello, nossolar
May I ask you where in Europe did you get your voice surgery and who the surgeon was? Do you happen to know what technique he was using?
Generally I think it is a bad idea to talk or cough that early after the surgery - How long was it between the surgery and the doctor asking you to speak? But some words of calming: I think also for people at Yeson, it takes some weeks for the voice to be not hoarse anymore, to be a bit stronger and to increase in pitch. At the beginning, all will be swollen and that means the vocal chords thicken and make a lower pitch, the scars are not healed yet, so the voice is hoarse and the muscles are weakened, so is the voice, if you get botox, the muscles are even paralyzed. At Yeson, people are advised not to speak for 2 weeks, so few people really know what happens if you really would try earlier, and those that did by accident said they made no sound at all. So it is perfectly normal to go out of the surgery with a weak, hoarse and lower pitched voice, but after the rest period all of this gradually changes usually.