Just after some advice please, currently 7 days late, took a clear blue test on Sat am which was negative. My cycles can be irregular, shortest 23 days, longest 42 days. Not ttc but may have got a bit carried away around ovulation day had i had my average 28/29 day cycle. Should I test again using a different brand? Probably am just over thinking things but have read mixed reviews re clear blue. TIA