It is not wise to rule out infections based solely on a description of symptoms you have read online or elsewhere as not all cases present the way they are described in textbooks. I would advice two things, one would be to get yourself tested. Give both your urine and the white stringy substance for examination to the laboratory. The urine can be checked for pregnancy
as well. The second thing would be a physical examination, to be conducted by a doctor.
Please visit your doctor for the same. In the meantime, avoid all forms of sexual contact till your doctor would deem it safe. Hope this helps.