Ay mama, kaya mo yan! A few of us din experienced na close cervix even near the end, and honestly it's totally normal, your body will open up when it's ready, hindi ka naman late pa sa 37+ weeks mo. The walking and yoga you're doing are great, pero just be patient with your body din because some moms open up lang talaga very quickly once labor starts, so don't worry na parang stuck ka. Best pa rin siguro to check in with your OB at your next visit para makita niya ang full picture and give you peace of mind, especially since you're already near your EDD, baka may other signs siya nakikita na hindi mo napapansin, or baka kailangan lang mag-adjust ng approach depende sa baby position mo. Hang in there, mama, labor will come!