For the last couple of weeks I've noticed my 1998 Ford Windstar starting rough, off and on. The RPMs weren't steady and the van would stall if I didn't keep my foot on the gas but then the next time it would start up perfectly. A few days ago I noticed the heater was not working. Then Xmas eve it began not exhilarating properly, being very sluggish stalling twice on the road while my foot was on the gas. I opened the hood and found parts of the engine wet with dirty looking liquid (we think oil/coolant) and small puddle on the ground. I checked the dip stick and found the level to be unusually high. We towed the van home and it has not been started since. We think it's a blown head gasket but from the videos/pictures on line have water coming out of the tail pipe. Please tell me your thoughts. Thank you.