Im 21 years old, im 5-4, 170 pounds. I have PCOS and a bicornuet uterus. for the past month i have been having diarrhea off and on, i keep having this thumping feeling in the left side of my belly beside my belly button. im also having a vaginal discharge that is a clear mucus and also white and milky looking, no smell. i went to the hospital yesterday and i had a pregnancy test done, the pee test was faintly positive and the blood test was negative, they checked for most everything and took blood and they said everything looked normal and ok. they did not do an ultrasound tho. what could be causing this?