So i already had 3 ultrasound and im 13w and 3ds.. my first ob apt is not until sept 12 which i'll be 18 weeks.. because i had 2 mcs last yr.. i was thinking about paying for an ultrasound in sept but i know my ob would want me to have one to see how our little peanut is progressing.. im just scared that if i do pay for one after over a month then another one that would affect my growing baby... thought about buying a doppler but im soo confused.. advice anyone?!