unpublishedflight...

I've gotten myself into a jam. I have an upcoming flight on JetBlue (Basic Blue) and I had a work thing come up. It's going to make it very tight to make my flight, though it still is very possible. I don't want to cancel because I'm still hoping to make my trip, but if I miss my flight do I have any options for JetBlue Missed Flight ? Will they charge me a fee for missing the flight? I thought about changing my flight, but it's the only flight out that day. so I'd have to wait 24 hours and get charged a $100 change fee.