Really low

Hey there, this is my first ever post. My partner and I have tried to have a baby for over 6 years. I have been for tests and blood work all come back normal and fine. I have had 6 miscarriages over the past 6 years. This is for our second child. It's now effecting our relationship as I am seriously down about it I feel like I'm a failure every month when mother nature calls. This month I thought It could be since I started spotting 5 days before my period. Which never happens! The next day it was a lot heavier. No cramping at all. I don't know what to think or do about it. It's getting to the point were my friends are pregnant and I can't go near them because I am jealous and get really emotional about it.