UPDATE! I ended up ordering this bag and have been using it for a week.. https://smile.amazon.com/dp/B01NBAQ0X2/ref=twister_B00P289UIS?_encoding=UTF8&th=1&psc=1

It is awesome. It is definitely BIG but I'd rather have too much space than not enough. It also fits my planner, my tablet and my wallet which eliminates my need to carry a purse day-to-day. It's only been a week but for the price I think this bag is fantastic. Thank you for all of your help and advice! It was a lot of the Amazon/Adidas bag recommendations that led me to this one since it was similar but bigger!