Tired and Lazy

I have tons of house chores todo but I dont have any energy to do it, I am so tired and lazy and I dont know why..I have been laying in bed for more than 2 hours now while talking on the phone, all i wanna do is just to stay in bed and watch tv, this is not my normal routine but I dont know why I feel like I want to stay in bed...thanks to my son who is cooperating my lazinesss hehehehehhe.