Is there any way to expedite a doctor's visit without being in Urgent Care or the ER?

I am 29F, on government medical coverage, and a couple weeks ago I called my doctor to schedule a first visit. The first available appointment is the very end of October. I booked the appointment, but I am concerned about my health until then. The past few days I've been getting lightheaded when I stand up or move too quickly, the past year or so I've been having heart palpitations, and today I've just been feeling "off" in my head. Like if I turn my head too quickly I might just drop.

I am concerned, but it isn't Emergency Department status, so there isn't anything I can do but see my PC. Is there anything I can ask for or inform them of that can get me an appointment with a doctor or specialist sooner?