I too reguarly get the train, I'm 6 months.
Feeling faint on a sardine packed 4 coach train seems to be my thing !
I have plonked myself on the dirty floor before ha ha.
Find the idea of asking for a seat embarrassing. Soooooo English i know, stubborn yes lol. Plus i would be worried that i had forced someone out of a seat, that they in fact needed even if it isnt obvious.
I do ask for people to open the windows. I do refuse to push down into the isle leaving me nothing to hang onto. Arms not as long as a mans and dont want to over stretch during pregnancy.
I agree some people spot the very obvious bump but are either to frightened to offer in fear of offending someone who isnt actually pregnant.
Or chose not to notice, pretend they havent seen.
Or just innocent people in their own world (ordinarily I would probably be in this category, oblivious to my surroundings).
I have ordered a baby on board badge. Not sure i can bring myself to wear it though. Silly hey!
I'm aware that this is my own issue and chose to get the next train when i can see that I'm clearly not going to get a seat.
I have been caught out however and got onto a train thinking i could see spare seats only not to be quite quick enough to seat myself in a free spot.
Then my dilemma is that passengers have piled on behind me leaving me no room to hop back off.
Oh well
I decided that i would be more annoyed wearing a badge and to be then ignored. So would rather suffer in silence and try and avoid packed trains where possible.