and made it to the gate 11 minutes later. This was with all of the UGA fans. I think you will be fine.
do it with the skycap out front. Lines to sign in and check a bag can be long.
TSA backs up from time to time but that time of day is usually pretty open.
Traffic can delay you getting in to ORD as well.
Also check in night before and make sure your TSA Pre actually clears.
Normally I'd plan to arrive 2 hours beforehand, but most times you can get away with closer to 75 minutes.