So I think I have a yeast infection

Stacie β€’ Mother to Ben πŸ‘¦, Bash πŸ‘¦, and Braxton πŸ‘Ά, 420 enthusiast 🍁πŸ”₯πŸ’¨, lover of life 😍✌
It itches down there and then when I go to use the bathroom, I feel like I'm peeing fire! 
​And to make things worse, my period is 2 days late and for the cherry on the top, I took a hpt and I got a bfn
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​What's going on with my body? Can anyone tell me?