What Steps Can I Take To Have A Successful Pregnancy After Experiencing Multiple Complications And Miscarriages In The Past?

Hello doctor, I got married last 2017 and after a year of marriage I approached the doctor because I have no children and they told me to have sex three nights after the injection rate three days after the test to get the ovum to develop, I was pregnant at the test next month. 3 embryos developed, we injected a fetus as advised by the doctor, then bleeding occurred in the 5th month, then sutures were placed around the fetus.Back in the 7th month there was bleeding and two babies had a miscarriage in 4 days and we had not seen a doctor for the last two years due to ill health. So please tell me what are the ways to have baby without getting problems like this again ... I am waiting to your reply docter ... Thank you .... !!!