Non consumption of marriage

Its been 6 months that we are married. And from the day one I found some issues with my wife and noticed she is not mentally fit.. Here parents don't told us about this before marriage. Here parents told me she is under some stress due to marriage. So her parents scheduled the appointment with the physiotherapist and they advice some medications related to mental health. Also side by side marriage counseling was also going on. In our first appointment with the doctor I asked the doctor whether she was taking these medicines before ? And doctor said yes and said she was under medical treatment about 1 year ago. But when I said her parents didn't told us about this thing then the doctor also get shocked so I asked the doctor to give past information to me about my wife as she was going under medical treatment and doctor refuses and told me that I must asked the same to her parents so when I ask her parents for the past treatments they refused and said there is no data. But I am 100% sure my wife is having mental problems and issues. Also here parents forcing to not talk on this matter. So what can I do. Me and my family is suffering from this as my wife is not able to do anything neither we have any physical relationship and nor she accepted my home and she always in stress if she had not took the medicine. So please advice how can I take her for medical test and her parents is not allowing us? Thanks