Six weeks since first day of last period (31/07) negative preg test. what's wrong with me? no lifestyle changes. what to do?

Not ovulating?: You may not be ovulating. How long have you been trying? 80% of women your age will conceive within one year of trying. You can test for ovulation at home with a store bought test. If you are still having no luck see your GYN. You might need medication to help you ovulate. Keep in mind your partner needs to be evaluated too starting with a semenanalysis. Good luck.