1998 Chevy Camaro Occassional leaking

I recently got my coolant system flushed after noticing that someone or something poured about a quart of oil into my radiator. Prior to the flush, I was having the dial on the temperature gauage going from the middle of the gauge to the far right; only occassionally getting far enough for the fan to kick on. I would check the oil levels and they were good if not slightly over, but my radiator did not seem to be holding water/coolant. I replaced the radiator cap because we determined that it was loose and was allowing fluid to come up through there, and that seemed to help temporarily but then after repeatedly checking, the levels were still low very shortly after it was filled. I have not seen any leaks coming from the radiator itself, however over the last 24 hours, there have been two times where I would park my car (both on and off), and would come back shortly after to notice a small puddle of what looks like my antifreeze located on the ground under the front of my motor. I have no idea where this leak could be coming from because time after time of checking for them, nothing seems to be leaking. Also, since the flush, I've driven the car a good amount of distance and haven't noticed any problems with the way it runs.