We are newly married couple since last 6 months. 
On 3rd May 2016, her period did not come which was expected. So we thought she is pregnant and went to the doctor on 5th May 2016 for a just general checkup and then got a test done through a kit which showed faint positive. Of course, it will as it was just a few days passed only.

Then the doctor she suggested HCG 5000 injection, after which my wife got severe abdominal pain during the whole night. I checked on internet whats the meaning of that injection then I found that its something different and should not be given at so early stage. Then I again complained to that doctor for this pain and then she gave antibiotic called Tangim and then some multivitamins (Zincovit) along with sline and then after 24 hours my wife was fine but still today is 11th may and she has little bit pain which is not so much as compared before.

I am surprised again during discharge time that same doctor again says that I need to give same HCG 5000 injection again to my wife after 10 days which I don't think is right at this stage. 

So I want to know from you that what she is saying is correct? 
Should I allow my wife to take HCG 5000 again knowing what issues happened last time? If yes, then why I should allow as I know the purpose of injection and we are at this early stage. Please suggest.