Kind of pissed because my best friend "wants" to make plans but then goes off for a week on the trip…

Kind of pissed because my best friend "wants" to make plans but then goes off for a week on the trip that we planned without even letting MW know she was going. Just cause I'm pregnant doesn't mean I can't do things. I send her a photo of my invites for my baby shower and no reply but then my other friend who i haven't talked to in over a year because of her moving for school loves my invites, has already bought me gifts and helped out with where I should do the baby shower and what theme to do and already took three days off just to attend. Kind of making me feel shitty.