Overdoing Workout

Yesterday I worked out in the gym for a little over two hours. It was because I wanted to finish just in time for my son's school dismissal so I wouldn't need to go home anymore. I did a lot of weight-lifts that were not included in my program. I sweat a lot and it felt good. But when I woke up this morning I felt very sore and I've got stiffed neck. It was my plan to work out again today but my neck really bothers me I could use some best muscle supplements to relieve it. Next time I will just take it easy.