Guccigirl my sympathies for tomorrow. My own (wonderful) Mum also finds tomorrow difficult since we lost my Nana (her Mum) 8 years ago. We all still miss her
I'm hoping to cheer her up with the fact she's going to be a Granny for the 5th time!
And I also have a stepmother who is probably the most crazy evil bitch on the planet...she'll be getting f.a. from me and I haven't seen her in years.
Sorry for the downer, not sure where THAT came from 
But think, next year, you'll be a Mummy and hopefully enjoy the day for a slightly different reason 
Re: jeans, could you not order online at all? Most return/refund services are quite good from online stores in my experience.