Drove home from work checked coolant tank on flat ground twisted cap off and didn't have a ounce off pressure behind it and was a bit on cooler side . Felt the hoses and could squeeze them so no pressure there either. Pulled up on incline and twisted co tube cap and coolant wanted to come out. Cars not over heating, have ac and heat but something doesn't seem right. Past 2 days I could hear noise under hood as I walked to it while it was running and today smelt coolant ass I walked into work. Do I have something or not?