New here (children and loss mentioned)

Mo2and1

Hello, I'm new to this board. A little background. I have a 9 year old girl, 7 year old girl(their dad and I are divorced), and a 6 year old stepson. My husband and I started trying for a baby together) over 4 years ago, over two years ago we got pregnant (spontaneous) with identical twin boys. At 14 weeks I had a vagal response and passed out. I unfortunately landed on my stomach and the boys passed away. We started trying again right away (I'm 36). I've had one iui that didn't work, multiple rounds of clomid, and my doctor told me to try ivf due to my husbands count and motility. 

Its been a long and hard road. We want a baby so badly, and I know we have 3 beautiful kids, but we want a baby together so desperately. I had the trial of transfer a few weeks ago, a hysteroscopy a beak and a half ago to clear up my uterus, started clomid yesterday and start the shots on Monday. Anything I need to know?  I'm quite terrified and pray it works.