Thrush

Lindsey • Baby #3 due September 2021
Has anyone had thrush? If so, how did you know? My nipples have taken a severe beating from breastfeeding and recently are super sensitive and sometimes have this burning stinging sensation - like someone is dipping them in acid! 
My baby has no diaper rash or marks in his mouth. I have not been on antibiotics, was negative for Strep B, have never even had a vaginal yeast infection but my LC said it could be Thrush and has me taking probiotics and limiting my sugar intake. 
Has anyone else dealt with this - how did you know it was 100% thrush and what did you do? She also said I could have raynauds of the nipples - o do have terrible circulation and raynauds in my hands and feet but again no way of diagnosing this.