Hi Teressa my back / neck was also killing from about day 3 . The only thing that helped was talking to nurse who agreeed I could take nurofen , this really helped if anything just at night with back pains . I also put pillow under my legs for support plus V pillow & travel neck pillow , try a hot water bottle at night and 2 senna tablets every night for tummy ache as they are natural . Might be worth asking nurse first as nurofen isn’t usually allowed but my back pain was worse than boob pain .
Good luck xx