You are getting some great advice here--listen to it!
I especially agree with elisheva--no vag checks anymore, at least not until active labor. Vag checks are of NO USE at this point, are NOT PREDICTIVE of when/how you will labor. Just say no, and focus on trusting birth, your body and your baby instead.
I will also say that I've had clients with labors like your first--even with second and beyond babies. Something about their pelvis and baby size just seemed to hang up labor at around 7cm....for many hours. But all had normal, vaginal births! If this should occur for you again, a long stall at advanced dilation, the main thing will be to stay fed/fueled, hydrated, keep peeing regularly, sleep between contrax--so as to keep up your physical stamina-- and DON'T LOSE HEART! As long as your own and baby's signs are all good, you can wait it out. One mama stayed at 7cm for 12hrs--and then suddenly, literally, POP! baby cleared the 'pelvic tight spot' and was born within minutes.
You can so do this! I add that being upright is NOT what helps every baby/mama. Sometimes, counterintuitive as it may seem, sidelying is best--well supported with pillows, totally relaxed. Or knee chest....try different things if this happens again, see what feels right. There is no one right way to get a baby born, best to follow your body's signals and be ready to try everything including stillness and horizontal instead of active and upright.