Severe pain in lower bones and back.

After pregnancy my wife develop severe pain in lower bones and back. I consult a doctor (GYN & OBS) who advise for blood check up. Blood report result shows calcium 10.40 MG/DL, TSH by CLIA Serum 3.41 πIU/ml, Free T4, Serum by CLIA 1.17 NG/dl Free T3, Serum by CLIA 2.32 pg/ml 25 Hydroxy (OH) Vit D Serum 11.66 ng/ml She has written T.shelcal HD and T.Losmia 60K for 8 weeks. After taking medicine for about 4 week she didn't found any relief in the pain. Do I need to take second opinion on the same or wait for more time. One of my friend advised that ask ur Doctor for  vitamin D3 injection, it will be very effective. Please advise or guide me what shall I do shall I go for second opinion or ask my doctor for vitamin D3 injection. Please advise some D3 injection which are good to take available in market. Thanks in advance for all your suggestion and advise.