glucose testing?

When did you guys get your glucose testing? I just found out I probably won't get mines until after 28 weeks, & I'll be 27 weeks tomorrow.has this happened to anybody else? I'm worried that now my doctors office is really taking advantage of me... I can't help but to feel like they're not doing everything they could be doing to make me feel confident in their practices.. I'm not happy to be getting my testing after what I thought was supposed to when I got it. Ugh, I'm so frustrated. Isn't is between 22-28 weeks or something like that? I need advice!! I'm seriously just thinking about trying to start the rest of my prenatal care elsewhere because I am so unhappy..😒