Sooo I went to the er today due to some clear watery cm and they drew blood that showed my hcg level was 557 I'm supposedly a little over 4 weeks according to the dr however on another website I found it let you select the number of days in your cycle for example my lmc was aug 7th my cycle is usually 32 days thus I'm 3 weeks 6 days. Do the doctors just use 28 days regardless?