Running hot and leaking coolant in rear underside of motor and front underside of motor?

It all started when it overheated once after putting brand new front brakes on, then the passenger side locked up and ended up heating everything up before I was able to pull over and stop. Now have a bad coolant leak at the underside rear of the motor, near the firewall, and also the underside front of the motor, where it's making a loud squealing, and squeaking noise. (Possibly a pulley, or maybe it could be the water pump starting to fail?) Also, just had the head gasket, oil pump, and all gaskets replaced a couple months ago if it has any relevance to the current issue with it?