Why does my oil warning light keep turning on and off in my 2000 Dodge Grand Caravan?

***This is driving me INSANE!*** The warning light in my dash that looks like a dripping oil can keeps turning on and off. I first noticed it when I was stopped at a stop sign, I worried and went straight home and found it was dripping anti-freeze. That continued to drip occasionally, small amount-decent amount, was hard to tell where the anti-freeze was coming from, so had used a stop leak formula and that stopped the leaking. BUT the oil warning light continues to turn on and off, dinging annoyingly and randomly. Changed the oil at home, since it was due anyways. Still the light comes on and off randomly. We took the negative connection off the battery hoping to reset the computer system, still it dings. I also searched and found another possible solution to reset the system, so I tried this: turned the key without starting the van, pumped accelerator 3 times slowly and turned key off- not sure if that worked yet as I haven't driven it since doing that a few minutes ago. I need some answers please, cause if I have to drive that van another day and listen to the annoying dinging along with my children's usual screaming and chatting, I'm afraid I may get into an accident! I appreciate the help!!!