you may have scratched the labia (the skin hanging down) and when you urinate the urine hits this skin and it burns. this can also happen if there is an external yeast infection. that being said if you were using a toy or saliva in the area some bacteria may have entered the urethra and you could have a uti (urinary tract infection). call your doctor and just say you need to be seen for painful urination x 1wk. unknown if uti or yeast infection. that way you make sure they test both your urine and do a culture of your vagina. if you really think it may be yeast, don't ******, go to a cvs, walgreens, wherever and pick up an OTC cream to treat the yeast. see if that helps. if after a few days of that its still happening you have to go to the doctor. they also sell tests at these stores now too for you to test your own urine for uti and even your own vagina for yeast or bacteria infections. i think they're like 16 bucks. good luck