Bfp after 2 losses

Monica
Hello all and happy new year! Baby dust to all for 2016! 
So I am 5 weeks now and have had 2 miscarriages in 2015 1 at 5 weeks and another at 8 weeks. I don't know what caused the previous miscarriages but I have read about a lot of women taking progesterone during pregnancy to help baby stick what are your thoughts on that? Also should I try and get a doctors appointment ASAP just because of my history of losses most doctors won't see you until about 8 weeks.
Thank you all!