BFP, BFN, AF, then BFP?!

S
Has this happened to anyone else? I'm not really freaking out, just baffled and somewhat amused by how confusing my body is being.
​I'm like clockwork and if I'm a day late I know something is up. I track my cycles and was due to start AF this past Monday (9 June). Took a First Response Gold digital on Tuesday the 10th when I didn't bleed: clear YES+! 
​So of course I was ecstatic and called my doc to have blood drawn.  I go in Wednesday the 11th, and both the urine and blood tests are negative! Urine didn't surprise me, but the blood test was a quantitative, so apparently no traces of HcG were found. I took another hpt in the evening to find a BFN. Thursday the 12th, I start bleeding and cramping (the cramping was awful) but no clots, and after a day it all but stopped. I'm also still feeling insanely pregnant (smells are different, nausea, headaches, fatigue, emotionalwhatintheworld).
​So this morning (14 June) I take another First Response Gold digital and get another BFP! I'm still barely bleeding (day 3), not heavy enough to even warrant more than a little TP in the undies (sorry for TMI :( )
​Has this happened to anyone who has gone on to have a success story? I obviously have to go back to the doctor for more bloodwork after the weekend and I have a feeling in my gut like everything is fine, but I'm seriously laughing at how confusing this is.