Faint line hours after testing
I’m 18 months since last exposure.I need to find what caused the faint line on my Biobsure test hours after testing. Over night in fact. I tested and it was negative at 15 and 40 minutes and also I think after 3 hours when i checked it was negative but following day when I check in the bin I saw a very faint line and I panicked and bought 3 more tests and they were all negative and this time I threw all of them away after an hour.
What I need to know is can I trust test even though it showed a faint line over night, am I safe or should I go do a lab test?