very tender nipple, thrush?

my left nipple, under and internal, is so sore. i'm wincing while DD nurses. latching and letdowns don't hurt but her sucking does. it hurts when i walk around and was very sore when i but my comfy sports bra on. i don't feel any lumps and it's not warm to the touch. it does have a little pinkish color to the top but no other symptoms. i can't do garlic due to food intolerances in DD. should i go ahead and treat this with GV or what it out? can using GV cause problems if it's not thrush?