Missed periods by 10 days. About next?

I got married in Nov 2014. My Previous period date to my marriage was october 2014. I did a pregnancy test in first week of december which was negative and second week resulted positive. I had to undergo medical termination in feb 2015 due to improper growth of the baby. After 1yr again i had missed periods by a week and the test resulted positive. As per the doctor that was chemical pregnancy or false pregnancy. Doctor advised my husband to do a sperm test and found som infertility problem. He was prescribed with Paternia plus tablets for 3-4months(july-october) and he stopped the intake of tablets. We planned for the baby for the subsequent months. This month i missed my periods by 10 days. Can u plz suggest me how to go ahead next. Im scared of having miscarriages again. Praying for a healthy baby. Which doctor to consult? How do i go about next? Kindly guide me cause i have mentioned my history and expecting for a healthy conception this time. Kindly advise . Thank you