Ok so a little backstory. A few weeks ago I was driving and the head of my idler pulley sheared off. I managed to get it home but it had overheated pretty bad. Replaced the bolt and changed the water pump gasket because it was leaking somewhere but couldn't find out where and the parts store said that's the issue. Still overheated when I drove for more than a half hour so I bought a new resivoir yesterday because it was a little cracked and figured it was leaking from there. I put it on yesterday and let it sit overnight. Today I put new coolant in it and when I started it the upper radiator hose swelled up like you wouldn't believe, when id loosen the resivoir cap it would release a bunch of pressure and the hose would shrink back down to it's usual size. Then i drive it to see how it does and I lost all my coolant. It's coming from the left size of the motor because you can see where it had sprayed the inside of the hood. Could my issue be the waterpump/thermostat? This is my daily driver and I cant afford to miss too much work chasing problems. Thanks in advance guys!