Uy, I totally get your worry, 40 weeks is nerve-wracking talaga! But mama, please check in with your OB first before trying anything, kasi sila lang ang makikita ang full picture ng cervix mo at baby mo, at alam nila kung safe ba ang options para sa iyo specifically.
I won't suggest what to do kasi medical talaga ito, pero I will say: thick cervix at 39 weeks isn't unusual, at maraming moms pa rin naglabor naturally after their due date, so don't lose hope. Stay calm, keep walking if you're comfortable, rest well, and most importantly, trust your doctor's plan. They'll decide together with you kung kailangan ng anything else, or kung kailangan lang talagang maghintay. You've got this, mama!