Anterior placenta and measuring 3cm larger... Dr. wants me to get an ultrasound to make sure everything's OK...

Anyone have a similar experience? She kept saying "you know your body, you know your babies patterns" but I don't... I really have no idea of his patterns because they've been so erratic the entire pregnancy and especially considering the anterior placenta... She was super unreassuring as I asked what to look out for in terms of worry... And she just kept repeating "you know your body and your babies pattern" 😔 I already feel like a failure because I genuinly don't... FTM feeling shitty. 😔