Chirping noise from I think the Serpentine Belt?

I’m a uni student driving across the country and while I was pulling into my hotel, I noticed a chirping sound coming from my hood. I’ve had a small oil leak that I took in to get diagnosed at an auto shop and they said it’s alright as long as I keep track of the oil level and add oil when it’s low. Does anyone know what the problem might be or how serious it is?