Aiyoh don't worry, mostly they just check your blood pressure, weight, and urine like usual, then do ultrasound to see baby's position and how much fluid you have, no pap smear lah, that's not part of routine 3rd trimester checks! Closer to your due date they might do a cervical check to see if you're dilating, but they'll explain first so you won't terkejut, and honestly knowing what to expect helps with the anxiety, just ask your doctor what they're doing before they do it, they don't mind at all.