Dreams...Nightmares...A sign?

SO as it gets closer to THE DAY for us, I am working very hard to be a peace. I took Erin's advice and am in the middle of creating a prayer/love room. It is the perfect place to go and shut out the world and just "have a little talk with Jesus" - as Cleavent Derricks would say. What a fabulous idea! During the daytime, I feel pleasantly at peace with whatever the results of this should be. Nighttime brings with it all of my unsettled doubts and fears. As soon as I close my eyes, I am filled with all of the "What Ifs?"- What if it is negative, we go through with ivf and it doesn't work - what if IVF isn't God's plan, and we are playing our own God - what if we adopt and the child decides to leave us for his/her biological parents when they are older?...etc, etc, etc...Not only am I filled with what ifs, but when I finally pray through those thoughts and block them out and drift to sleep - my dreams are filled with scenarios of what could happen...By the time I waken, I feel so tired from struggling through each dream.
I have learned that my happiness in the light is much greater when I avoid emmersing myself in everything baby. Lately that has been a difficult task because two of my dear friends are about to have their babies. I am so excited for them and it is easy to get caught up in their happiness. I even looked on craigslist at baby stuff...It is so hard to restrain myself from feeling that excitement. I remember when we were first trying and I just felt SO sure that we were going to get pregnant. I went and bought a couple of baby items. After three years and certainty that we will not be walking the easy road that many couples do, I have tried really hard to avoid getting caught up in the baby craze...So maybe I have been pretending for a little while that we could be any of the other couples that are pregnant, when in all reality, we may never be. I HAVE to keep reminding myself of this. It keeps me grounded and actually more happy. ALL of that to say, perhaps in allowing myself to get caught up in all of it, I am responsible for those crazy dreams at night. So how in the world to I stop?