Hi, this website, Travel China Guide(https://www.travelchinaguide.com/) , is a reliable China travel service. It provide much useful information about tour to Chongqing, including the route, accommodation, attractions and general price.
Well. I think 2-3 days are enough for travelling in Chongqing. Since you have 2 weeks, I suggest you have a patulous China Tour Packages(https://www.travelchinaguide.com/package/) to other cities, such as nearby Chengdu & Jiuzhaigou, or a long-trip to Shanghai, Xian and Beijing.