hun I got you I have that issue all the time. Although I'm not sure if its common It might be the way we sleep. I found just taking a shower and letting the warm water run down my back helps alot. Also if you sleep with pillows pilled that may be a problem causing a strain on you hun. GOod luck I hope it gets better!
I know the feeling, the extra weight it pulling, breast weight may also be doing it, my boobies were bs before i got pregnant, the hormones triggered more growth and I am now 38 DD and have not started producing milk yet