I think i've had a yeast infection for almost 2 weeks now, itching, burning, painful during sex, white discharge and smell is off. what do i do?

See doctor: Make an appointment with your gynecologist and have cultures taken so you can be pit on proper medication.

Sounds infectious: See doctor for diagnosis and treated if needed. These infections in women can become longterm and result in pelvic inflammatory disease which causes infertility. Also, to prevent STDs, try to use a condom with new partners especially until you are very familiar with their sexual history and sure they may not carry disease. Some disease like HPV, Hepatitis and HIV may be silent