PELVIC ULTRASOUND GOOD or BAD for 9weeks pregnancy???

Ok lang po ba mag pa PELVIC ULTRASOUND sa 1st trimester mga momsh. Yun po kasi ung ginawa ng Oby sakin pero ung doctor ko TRANS V ung binigay niya saking referal. pero almost a week na bago ako nag pa ULTRASOUND matapos ako bigyan ng referal. Sorry firt time mom here. Thank u in advance.