Its 3am and I can't sleep I think my body is overly tired from Disneyland earlier because my arms…

Its 3am and I can't sleep I think my body is overly tired from Disneyland earlier because my arms and legs feel like dead weight we have been walking around from 11:30am(up getting things together at 8:30)-10pm and got home at 10:30pm. My body is only used to 2 hour trips like when we go to a couple stores. Anyone elses body do this after walking around all day?