Ughhh! This is making me mad

So I was running the lipo this morning and it was fine then the truck just stopped and the lipo isn't working! I tried it in another truck. Nothing. Plugged it into the charger and didn't read it! also tried 3 different lipo connectors and nothing! Help me! it wont charge or discharge sense the charger wont pick it up. There is no swelling. this is a pro-tek 3800mah 2 cell lipo running with a castle sidewinder and 7700kv motor. Please help me figure this out quick!