I Am Very Concerned. My Girlfriend Had What She Thinks

i am very concerned. my girlfriend had what she thinks is a yeast infection a month ago. she now thinks she has a uti because it hurts when she urinates, and she claims she always feels like she needs to go. i tried reading about it online and i saw gonorehea produces very similar symptoms. i just got out of the shower and noticed that the top of my penis is red and somewhat sore to the touch. she is going to see her gynocologist tomorrow but i am freaking out here. what are chances that its an std and what are the chances that it isnt?