Advice

My husband and I decided we were ready for our second child, so in Dec 2013 I had my mirena removed. In Aug 2014 we conceived, but lost it in Sep. I lost another one in Jan. I just found out 2 days ago I am 3 wks pregnant. I have been taking my prenatals everyday since Jan and since I have been feeling completely drain I have also been taking b12. I am feeling pretty good about this pregnancy but still a little paranoid. I am trying to not stress and not lift things that are to heavy. Does anyone have any other suggestions that may help me keep this one?