Will you lose your Pro Medals if you re-qualify from killer?
I don’t think so. But you might get more informed responses if you change the title of your thread.
No. They even stay besides as you are in lower ranks.
No, you keep them. Don’t be alarmed if your star doesn’t show up after you do reset, just restart your game and it’ll reappear.
Edited thread title to better reflect the actual question being asked.
Don’t worry, I’ve seen plenty of Gold Tier players with pro stars fighting their way back into Killer. If it doesn’t appear right away, just follow the advice of oTigerSpirit. There are very few things a reboot doesn’t fix.