everyone can you please help me do the math and what you think..so as of right now the blood work…

everyone can you please help me do the math and what you think..so as of right now the blood work shows im 8 weeks ..but my last period started feb 3rd which these pregnancy apps show im either 10-11 weeks..do you think i could be more than what i am ...monday i get my first ultra sound so ill fjnd out 100% but im xurious what you guys think