Is it normal to not get a light on or notice when car stops while on drive ?

Hello, although I cannot be sure, I would be focusing on excessive drag and load caused by a potentially worn air conditioning compressor. When the compressor is running, it normally creates extra stress on the engine and causes the engine to have to pick up more of a load. But, if the engine is not up to the task due to a fuel or air or ignition issue -- or if the compressor is binding when turning, the drag can be more than the engine can handle and stalling can occur. As far as warning lights - indeed, you would get no warning lights before a stall if this is the case --- and actually, wouldn't get warning lights for most other possible cause either. As this is a big safety issue, I'd have it addressed right away. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops