Dates are wrong surely!!!

Laura 🇬🇧 • One son 13/03/2005, had Ectopic and lost baby on 12th Feb2014 ❤️ 2nd ectopic baby lost Nov2014, had Darling daughter on 7/2/2017 ❤️ Early/Chemical Miscarriage Feb 2023
So according to a <a href="">pregnancy app</a> my LMP was 5th jan making me 4wks pregnant but my HCG blood level was 48 and apparently 3.5 weeks pregnant. Having cramps and slight light brown discharge...I'm a mess and can't stop crying incase my second bloods on Wednesday show a problem :(