AF 2 days late.... still bfn's... thoughts on dollar tree tests?

Jessi
So to get caught up... I usually have long cycles, but since ttc'n, last 3 cycles were back to back with af starting about the 4-8 of the start of the months ok... now I have started around the 15th back in May and June... here it is Oct 13th and still no af, "symptoms" out the wazoo, more then just af symptoms. The heartburn and nausea I'm going on my 2nd week with that, it's all throughout the day as well, the dizzy spells are dumb, peeing every hour if not sooner, had light pink/brown spotting at the the end of September. Never was enough to even cover the tip of a tamping when used for hours and only when I went potty did I see it on the tp.. (implantation maybe??) The sore muscles in abdomen, dull cramps that followed the IB but has since stopped other than an occasional pinch or pull.. lower backache, headaches, heightened sense of smell and my boobies look so full and pretty with only minor aches and mostly on my left one, which is odd... So, 6 days before period (7 days after IB) I used frer, bfn... 3 days later used dollar tree test, bfn.. This morning, thought I was going to hurl as soon as I sat up in bed, took another dollar tree test, bfn....... I usually never felt af showing symptoms other than cramping the day of and my cramps are pretty bad the first day and I'm a heavy pms'r... how accurate is dollar tree tests??? Should I just spend the money on a better brand even tho the early frer was a bfn?? I'm 2 days late now and I just don't know anymore... any advice or encouragement to not get upset with myself will be soooooo appreciated. Thanks ladies!