This is my first, but if it helps: many things that can go wrong during pregnancy are more likely to happen if they happened before. For example, pregnancy diabetes, a preterm delivery, eclampsia... If you had those before, you have a higher chance of having them again. So while I perfectly get your reasoning, having had two great pregnancies is actually a sign that this time things probably will work out fine again, instead of the other way around.
Hope you get what I mean...