hi, I am 27 year old female that has been having some health problems lately. I recently went to the doctor because of blood and bubbly urine, and was found to have bacteria. i was given two different types of antibiotics as the first one didn't work. I've finished all the medication, and two days later, when I had a bowel movement, there was significant blood on the toilet paper and on the stool, and noticed some white strings in the poop as well. Is this a parasite?