Hi. Any input would be greatly appreciated. I started charting a few weeks back. Certain days I did not mark due to inconsistent sleep, etc. I am 3 days late now and was feeling good about things, but the drop from this morning has me concerned. Is this nothing to worry about or is this standard prior to menstruation? I am never late and took tests on Sunday (expected date) and Tuesday. Very very faint lines, I think, but am going to retest on Friday. I am just more concerned now with the temperature dip right now. Again, thanks for any insight.