Aching bones really bad pain

So since I can remember my bones randomly ache it’s in my legs like my calf bones and my forearm bones.. it gets so bad sometimes so I all I just wanna do is go to sleep and hopefully the pain will be gone when I wake.. it’s not joint pain I know what that feels like and it’s not that.. recently the pain lasts days in both or one arms and in my legs at least once every two weeks.. my bones literally hurt so bad I want to cry sometimes I am 20 years old any suggestions on what this may be? I have also never broken any bones and the pain is constant.