You have not provided with the time of birth, however I have tried to check your matching and found that there is Nadi dosha in your horoscope matching. Which is never good. Nadi is for children and as there is a dosha it does indicate problems on this front.
Regarding adoption, please note that it is a decision that needs to be taken by your husband and you. Family members and in-laws will stop commenting once you both take a decision. Not only will you do a noble work by taking care of someone who is an orphan, but it will fill your life with happiness. Children are such that they bring happiness irrespective if they are yours and someone else. After you adopt, the child will use your name and will be recognized as your son or daughter. So think about is seriously.