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Thanks for contacting HCM with your health concern
1. The symptoms which you have mentioned does not indicate towards
pregnancy but probably yeast/bacterial infection. [Leucorrhea] and is/are normal during
puberty,menstrual cycle,pregnancy, and sexual excitement
PS. since thick discharge may also be a sign of pregancy but as home pregnacy test came out negative thus see your doctor to confirm your pregnancy
2. Consult a Gynecologist who will do a P.V. [per vaginum] and P.S. [per speculum] examination to note the type of discharge,and look for pathologies like cervical erosion,
fibroid,polyp, PID [pelvic inflammatory disease]
3. In your case it is probably mixed
vaginal infection i.e.: bacterial+fungal+ trichomonal thus you might have to take a prescribed course of antibiotic kit and anti
fungal medication both for husband & wife and a medicated pessary for yourself and gel for male partner.
PS. since you have taken a course of antibiotics thus it is worth mentioning that candidial infection is common in diabetic patients [check with blood sugar], patient taking broad spectrum antibiotics, patients on oral contraceptives and AIDS