Am i acting like a bridezilla?

i have 2 bridesmaids that are giving me a horrible time with everything. the one hasn`t ordered her dress yet & when i try to call her, she doesn`t answer & never calls back. the other, i`ve been trying to get some addresses off of her for the past 2 weeks & sat, she said she would work on it that evening. i texted her later that evening & she text back with "k. talk to you tomorrow. sorry." i still haven`t heard from her.. do i have a right to be upset with them and what do i do about it?