I feel like i have been getting yeast infections really easy. somtimes swelling of the vulva and odor. what can i do or help to prevent them?

Maybe not only yeast: Recurrent yeast vaginitis is pretty common. It often can be prevented by periodic (e.g. once weekly) oral fluconazole (Diflucan). But yeast may not be the only problem. Contrary to common beliefs, yeast causes no odor. Strong vaginal odor, sometimes but not always with discharge, usually is bacterial vaginosis, a different infection. Check with your doctor, or maybe an infectious disease gyn.