First odd thing which has always been the case for me is I only get positive lines at night. Maybe super,super faint lines in the morning and throughout the day. I’ve been testing like crazy for days and finally at 11pm last night I got lines that I knew were actually there on first response and clear blue. But, since they they’ve been fainter. I will test at 11 again as that seems to be my best time of day, but if they don’t darken after 24hrs since yesterday, do you think it’s a chemical again? My period is due in about two days. I have some early symptoms like I’ve had in the past.