Coolant Leaking Underneath

I had coolant leaking underneath my car. The coolant reservoir was emptied so I refilled it and drove it into a Car Center. They took an hour to test and inspect my vehicle and came back with an estimate of $1,300. They said I needed a new water pump, water pump housing, several hoses and gaskets needed replacing, new thermosat and coolant flush.
(Did I mention I was a woman). I told them to top off the coolant and I declined the repairs. I drove home expecting to have to add coolant again when I got home. I got out and looked underneath and my coolant was no longer leaking. In fact, My coolant reservoir was still full. So it had not leaked, whereas it leaked rapidly before. I noticed that the hose from the reservoir was now connected, whereas it had not been before. Could my only problem have been the outlet hose was not connected or should I take my car into another Car Center for diagnostic? It has not once ran hot.