Cervix checks


I have my doctors appt tomorrow @ 35 weeks and my doctor is checking for strep b. I kinda want to ask if he can check if I’m dilated but from all the stories I’ve heard about cervix checks being uncomfortable, I don’t know if I just want to wait until he decides when he wants to check my cervix. I’m stuck in the middle

Can someone tell me what to expect in regards to cervix checks? Is it fast? Do they just stick their hand in there or??? Lol help