Sometimes the staff offer you the 'disabled' changeroom or a larger one, sometimes I just bring him in and pop him on the floor on his blanket, other times Staff have offered to watch him (didn't like this as much at one store, the girl just left him in the pram outside - didn't buy anything there LOL)

Don't feel too put off, you'll work out what's best.

Go shopping with a friend who doesn't mind looking after your little one, but you've gotta get out there ! LOL

Good luck