I go through phases of being more interested in self-sufficiency, and I am growing veg this summer (though not enough to be self sufficient, more like just a few tasty treats) but.. well, I'm rather hoping that the world won't fall apart because I have medication that I need (probably forever) that I can't manufactor myself. Which is a right pain for any complete self-sufficency plans I can tell you.
Doesn't mean that we shouldn't have the skills to do as much for ourselves as possible though. I definately want to get involved in the Transistion movement for instance, which is all about local resiliance to outside shocks like rising oil prices.
After reading the 'Politics of Breastfeeding' recently, which made a strong argument for supporting women to breastfeed in survival situations (nourishing her so that she can nourish her baby rather than complementary feeding when conditions are less than ideal) I'm really set that its something I want to be able to do. Even my more level headed sister said that she was glad that she was still breastfeeding when she went on holiday for a month. She liked that she had a back up of feeding her baby in case of delays or the baby not eating local food - and she wasn't even going anywhere without supermarkets.
I think its normal for your maternal protective instincts to be kicking in during pregnancy, even if others wouldn't see the current situation in Europe to be a huge threat. I mean, look at those of us on Mumsnet who worry about a bit of cheese or under done steak, the risk is very low, but our 'protect our baby' instincts are very sensitive at the moment.
I think the risk is low, but don't let that stop you from enjoying growing your own veg and learning some more cool survival skills - thats a fun and productive way to deal with your anxiety. Its a lot better than just feeling anxious about the situation and feeling helpless to do anything about it.
You probably should limit your news intake though. I do from time to time because of anxiety that I have. The thing is, with the amount of news we get now (updates in the day, 24 hr news, websites, newspapers etc) our brain is hearing about each story many multiples of times, which because most stories are unsettling, means we are being made more anxious than we need to be. Do you know what I mean? If there is one mass murderer on the loose, and we hear about it 10 times, it makes the world seem much more scary because we are as anxious as if 10 mass murderers were on the loose? (Even though logically we know its the same one, the repetition makes it seem bigger and more immediate a threat).
My husband is also a laid back Bernard Cornwell reader, clearly all dangerous adventures are historical and therefore we are safe in the present. Mine balances it with a bit of Sci Fi though, so that he can worry about the future too. 