Yeah I've been off food too, but I just put it down to a version of ms. That's why I eat crackers during the day. Its something in my belly at least. Don't force yourself to eat a full meal, maybe just graze on stuff instead.
And no you don't sound bloody nuts!
I'm also a first time mum, but I'm trying not to over analyse every little thing, like I did while TTC for 15 months! Its hard not to tho, but I'm just kinda going with the flow. What really worried me at first was the cramping I'd been getting since I found out 3 weeks ago. But I convinced myself it was just everything adjusting to the change and since there was no spotting, it must be ok. I've since read and noticed that it only occurs when I'm leaning over, like at my desk at work, and if I lean back, it goes!!
Remember, if you are EVER concerned, ring your OB or GP, that's what they're there for - to answer our questions and to ease the minds of first time mums!