Hi, I used the oraquick home testing kit at 6 weeks and 3 months post exposure. I swabbed the top part and then took the swab out my mouth before swabbing the bottom part of my mouth. Would this contribute to a false negative? The control line turned pink on both and came put negative, i called oraquick's customer care and they told me that the test was valid. Although I had a canker sore on the side of my tongue and then a white roundish substance grew on top of it after the canker healed, could it be OHL? Please help. Thank you