I have used internet cheapies many times (I think I have a problem!) and they were always accurate. Sadly I had a chemical pregnancy/miscarriage after a few positives but AF ways weeks late so I can't blame the tests for false positives there and the 15 (yep...I was worried about another m/c- can you tell?) I did with this pregnancy all came up positive! when I wasn't UTD I had clear negative results. I am more worried about the beverages TBH! what was the OJ in? was it a tetra pak?
Same with the ones I use they're not from where you got yours from so maybe they're different somehow. Can't say I ever tried testing beverages though so . I have heard of diet coke getting a BFP before though. Got a few tests left, might get bored enough to try during the week