Pregnancy = 9-month sickness?

So Amanda feels like garbage today. We're fairly certain she got sick from me (I was sick over the weekend). Thing is ... it's tough to sort out the symptoms.

I had a sore throat; Amanda has a sore throat ... but it might be tied into the serious heartburn she's getting from the baby.
I was exhausted; Amanda was exhausted ... but being 8-months pregnant and having difficulty sleeping will do that do a person.
My joints hurt; Amanda's joints hurt ... but the baby is stretching in all kinds of directions, so that's not uncommon.

Usually, if one of us gets sick, the other follows suit. We're pretty sure she caught whatever I had. I'm wondering, though, whether we'd even be able to notice it as her being sick if I wasn't sick first.

Ah, pregnancy.