Ramzi theory - confused! Help

Louise
So I'm nearly 8 weeks and in the uk we dont get our first ultrasounds until 12 weeks. However I've got a Doppler and what I thought to be the babies heart beat is actually the placenta. So after reading up on the ramzi theory I thought I could guess the sex due to where the sound was coming from. However getting confused as its saying its mirrored on a ultrasound. But I thought the left side of me so where I would place my left hand on my hip would be the left side of my uterus which is where the placenta is... Which would mean a girl by ramzi theory! So confused? Any one help me please ☺️