How to tell?

Mama’s, how do we know if baby is measuring large? Ultrasound or Dr able to tell us without seeing them? I don’t have any more ultrasounds on deck, and I swear some of the movements I’m feeling are so painful, it almost feels like she is bigger than 33w3 days 😬 I feel them in my back, my sides - all over! FTM and no clue what is going on here 😂 even my husband is asking if we are sure she is only 33w! Is this normal?! I feel like I’m going to birth a giant!