Well, as it was, you were on the trail for 16 hours, and hallucinating near the end. You were smart turning back. Going your speed, it could have taken at least 3 more to get to the summit. Who knows how long to get back!
Good for you trying! Maybe next time try sleeping at Horseshoe Meadows one night and then at Whitney Portal the next. First night camping out is always tough for me -- I take benadryl to help me sleep on that first night.
