Saw a large oval silver craft with bright lights in the trees so we stopped

My husband at the time and I were travelling on Interstate 10 going through New Orleans coming from Jacksonville, Florida going to our home town of Donaldsonville, LA. We had passed through New Orleans and were on the elevated portion of I-10 over the lake. It was dark and there was no traffic. Suddenly I saw up ahead on the other side of the Interstate some bright lights in the trees. We drove up to the lights but we were on the other side of the Interstate so we could not get as close as we would have liked. We parked the car, got out and walked over to the railing. There was no traffic at all at this time. We stood there staring at a large ovalish object with large bright lights showing down into the swamp. There was absolutely no sound. Usually out there you would hear crickets and frogs and all kinds of wildlife but you could have heard a pin drop. We stood there just mesmerized. The next thing we knew it was light and we were standing where we had stood but it was 2 hours later. We looked into the trees and whatever it was, was gone. We looked at each other and said, let's get the hell out of here. Neither of us have any memory of what happened in that 2 hours. We are divorced now but every now and then I will ask him about it and he says he doesn't want to talk about it. I want to know what happened. Many times I think I will get hypnotized and maybe then I'd remember but there's some fear there. But I would like to know what happened.