Engine Help! Coolant Is Leaking Out Of My Exhuast

[MustangGT559]

So yesterday I turned my car on to warm it up, and I turn it on and its turns on really rough, so I turn it off and pop the hood and everything was in order. I try again and the same thing happens and I look under the car for leaks of any sort and I see this pipe of liquid so I turn my car immediately and swipe the liquid with my fingers and it was yellowish and I check my coolant levels and it was at 3/4. When I ran it the day before it was running good, I had no problems of any sort. No over heating, nothing at all. The only thing I suspected was a throttle body leak, but it was very small so I replaced the gasket but it still leaks?! I did some research and I found out it could be a cracked cylinder head, block, or broken head gasket. I just replaced the head gasket this January, resurfaced the heads and everything was fine until yesterday. Also the oil is kinda light brown. But the oil cap is fine ?
What could it be?

Thanks In advance

 

[stykthyn]

If you suspect coolant and aren't blowing clouds of white smoke I would get a test kit that detects hydrocarbons in your coolant.