Hi BeiBei,
sorry you are having to go through this. From everything I have read, your FS is correct, there is no more likelihood that people will miscarry a baby conceived via IVF. Even though I have not had a child via IVF, I am on a few boards with lots of women doing IVF and there are heaps of success stories with people having IVF babies after miscarrying IVF babies.
Having miscarried an IVF baby and a naturally conceived baby, I know that the loss of the IVF baby hurt lots more, as I had invested so much emotion and hope in the IVF cycle and it is such a high when you get that BFP and the low is so bad when you have the loss. So it is completely natural that you have fears. Hope someone can give you some inspirations. Good luck.