Took a first response rapid result test this morning (I'm 6 weeks 4 days according to this app) but my second line was fainter than it was a few weeks ago. Also took a clear blue digital with weeks indicator.. The week number went up from the last time I test with one like it is supposed to but I'm super curious to know why my fr test was so faint. And I did use fmu. Just curious if anyone else has encountered this. Pics are below.