Nervous wreck

Tomorrow morning I go in for my 2nd US. A follow up to last week when I measured 2 wks behind and baby with slow heartbeat. This has been the longest week ever. I have been through every emotion. I have yet to see any spotting or cramping. I'm keeping positive but I am completely terrified. My doctor said last week we had a 50/50 chance the baby would survive but to not lose hope because anything is possible. I know they say what they can to prepare you for the worst but the hell you go through waiting for the next US is just horrible. The limbo of not knowing... I am continuing to pray every day for a happy visit tomorrow. I still feel pregnant and have no reason to believe my baby has died.