Where is your baby located ?

Ericka • First mommy to be | 23 | San Diego 💙👶🏾🎀
I'm 18w4d and when I use my Doppler sometimes he's as low to my pelvic and then sometimes by my belly button .. Where is the baby suppose to be at this time ? Or where is your baby located October moms ? 
Due October 14th 
FTM 
Baby boy 👑👶🏾💙