2018 579 Peterbilt Clutch Pedal Very Hard To Press

Just curious what exactly could be wrong with the clutch. Truck is in the shop but just curious to see opinions till I hear something from the shop. Yesterday I had pulled into a washout and shut the truck off. Got done and started the truck and went to push in the clutch it was very hard to press. Got home which is 6 miles away from the washout and it was still very hard to push in. While it was engaged I could here grinding noise and didn’t sound healthy. Assumed clutch was fried. This morning started it to take it to the shop and when I pressed the clutch in it was a little stiff but nothing like it was yesterday, nor did I hear the grinding noise that I heard yesterday. Seemed like in low speeds truck seemed to shake. It’s a hydraulic clutch. Also looks like coolant line to the trans cooler is leaking. Another thing I saw was top of transmission and the tower is covered in oil. What in the world is going on ? Attaching picture of everything I can see