Achey pain in right side of neck, headaches, and back hurts all the time. Ever since I gave birth two years ago. Maybe its the way I sleep.?

Baby. True, or it could just be your new life. Babies change many things, including sleeping habits, the way you walk and carry things, lift things, and mothering. Also, this could be a result if delivery... More likely a result if vaginal delivery. Monitor symptoms, triggers, alleviating factors, and follow up with primary doc for eval.