is a "Free fluid: trace" normal at 6 weeks4days pregnant? tv ultrasound showed heart beat 150bpm and fetal pole and everything else was normal

if you've experienced this please explain what this means my obgyn didn't note about it but it concerns me because i have a bad yeast infection and i had spotting light brownish and reddish and weird colored discharge before the ultrasound ...also, what is retroverted uterus?

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