NST 37 weeks

Hello mga Momsh, ask ko lang if nag NST din ba kayo? I'm on my exact 37 weeks yesterday so i went on my OB fo check up and na ie din 2cm, thick posterior (not in high risk pregnancy) (all lab tests is normal) magalaw si baby pero nag suggest ang OB na mag undergo ako ng NST sabi nya kasi may contractions na ko ng in ie nya ko 2cm which i think normal lang kasi 37 weeks palang nag uumpisa palang ang contractions ko and mild lang naman. Nag ask ako mag kano sabi nila it cost php1,205. before that nag tanong din ako kung gaano katagal ang test 20-40 mins daw and then after that nag extend pa kasi under observation parin daw so i spent 2hrs sa NST and ie ulit 2cm, thick posterior parin so pinalabas na ko kasi mild to moderate lang naman contractions ko and normal yung galaw ni baby, then ginulat ako may discharge bill 2,237.96 feeling ko tuloy in scam lang ako ? may same ba dito ng nangyari sakin? Magkano NST nyo?