First Pregnancy - 34+6days

Hey yall, so baby girl is due Aug. 5th and at my last scan she was in 53rd percentile but I am still fully convinced she is bigger than they are saying she is. She is Head down and it’s like I am sitting on like golf ball or something with how low she is, is this normal? All ultrasounds have went really well and with her growth and how low my doctor is thinking induce at 37-38 weeks but he is fully convinced my water will break before then. Which also adds to my belief that she is bigger than they are “measuring”. She’s so low I can not sit straight up at all, and I sit slowly. It’s also gotten painful as she rolls around inside me almost like she’s trying to come out of my belly button. Is it just me ??? Anyone experience any of this??