Need Help! Advice! Something!

Jessica • Mother of 1. TTC baby #2. Miscarried 9•17•13 and 10•18•15 Rest in Peace Liam👼and David👼
Im 28 and my SO is 29. We are ttc baby #1 together. I have a daughter from a previous relationship; I gave birth to her at 34w due to a car accident. In September 2013 I miscarriaged at 13 weeks and had a d&c and was told I can try again in 6-8w. July 2015 I found out I was pregnant. We were happy but didn't want to get to excited because of the previous miscarriage but the doctors told us everything was going to be fine. I would bleed lightly after sex so we started having sex once a week to none at all (doctor orders). In October we found out we were having a boy but a week later I went into premature labor and lost him. I was 20w 3d. 4d later I had a d&c. The doctor told us they didnt know why this happened because everything was fine other then I have a weak cervix and 4-8w before ttc again and my next pregnancy I would have to be on bed rest for the pregnancy. Its getting close to 8 weeks and my SO is excited he's brought preseed and everything but I'm unsure, scared but I want the same I just dont know.😢😢😢