Commuting whilst pregnant

My excitable husband gave me a 'Baby on Board' badge the other night to wear on my commute to and from work. I'm almost 18 weeks pregnant - is it not too early to push people off their seats just because I'm pregnant?

My commute is a pretty dull two-hour journey which starts with a walk, then a train. Change. Then another train. Change. A walk. Then a lovely and wonderful train... finishing with a brisk walk. It's my only source of exercise at the moment, but it's about as much as I can handle in this god forsaken weather.

I haven't worn my badge yet. I think I may pluck up the courage to display that I'm pregnant further down the line, but will it leave me open to being vulnerable?

Which pregnancy week shall I go for? Perhaps when it's so bloody hot and stuffy and I'm dripping like a neglected lolly by a radiator. By then I will not only knock people with my rucksack and handbag, but my belly too...

Indulgences: Three mini honeycomb flapjacks from my Graze box (yum). So far, not bad! So I may have to tear open the large packet of marshmellows my hub gave me as he walked in from work. They're virtually fat free, no?