17DPO

I took this test this morning bc Glow said I was due for my period 3 days ago , but my cycles range by a few days so I didn’t think much of waiting to test. I didn’t test for ovulation, but again, according to glow I’d be 17 DPO. I didn’t realize until somebody pointed out the control line is much more faint than the test line! I took another this evening and the test line immediately turned bright pink while the control was faded again. Has anybody experienced this ???