Uy mama, itching during pregnancy is super common kaya don't worry too much! But since you're already 37 weeks and this is bothering you a lot, best to message your OB or go to your clinic para ma-check niya properly, hindi ko kaya sabihin kung ano talaga yan through message lang, and your doctor needs to make sure everything's okay with baby. Pregnancy skin can do weird things (mine turned into a pizza, haha!), pero mas safe na marinig mo directly from your doctor na walang alalahanin, ito. Sending you comfort, mama!