Any experience with Equate tests?

so I've taken about a billion HPT's in the past 4 days, and so far all of them have come up positive except for the Equate (wal-mart brand) +/- ones that I took this morning with FMU. I've tried getting into the dr. but they won't test me until 2 weeks after my missed period. (it's only 3 days, but I"m normally like clockwork...28 day cycle.) I'm going nuts. I am spotting a little but it's brownish blood when I wipe (sorry if TMI). Any help would be appreciated...thanks in advance!