I'm 17 weeks pregnant and don't really show yet (I'm tall), but NONE of my usual clothes fit either. Is it worth buying a few things in a bigger size in the meantime? I'd like to get value for money in terms of the number of times I wear things! I'm sure that actual maternity clothes would just fall off. My tracksuit bottoms are very comfortable, but not really right for the office or my trip to Paris next weekend!