Most people who get repeat infections get them from untreated partners so it's really important to make sure your partners are also treated. That said, NGU can be challenging because sometimes the medical provider is unable to determine exactly what bug (i.e bacteria, virus or parasite) is causing it.  If you have not yet been tested for mycoplasma genitalium, you could ask your provider if they could order this test for you. When NGU recurs soon after treatment or never gets better, it's sometimes necessary to try a different type of antibiotic.  You could ask your provider to check the latest CDC treatment guidelines, or seek consultation from an expert in sexual health.