Will not start and coolant leak

A couple weeks ago I flushed my heater core because I had barely any heat. The flush went well. I have amazing heat now. A week after that my car started leaking coolant. The light would come on telling me to add coolant, but it was not overheating. But my temperature gauge is working because it will heat up to temperature and shows me that on the gauge. I would add fluid into it, the light would go off, it would be fine for a little bit. Put some cardboard under the car and learned that yes it was definitely leaking overnight. Added fluid and was driving one day and while driving the car shut down and I pulled over to the side of the road. It would not restart even after adding fluid into it and giving it time to cool off. I had my OBD with me, so I ran it, and I received a code referencing the camshaft sensor. (I will attach a photo).
Like an idiot I deleted my codes and I've never been able to get them to read since. I had the car towed and yesterday I looked to see if I could find the leak. I saw a drip coming off of the crankshaft pulley but was unable to see above that to try to find the source. I thought it was the water pump but just now I was recalling it pulling the code when I first had it shut off on the road. So now I am at a loss as to where I should start, and money is tight, and this is my only vehicle. Thank you, thank you ahead of time for any help.