So I have always had pretty irregular periods. I got my BFP on January 5th. I went to see my doctor to confirm on January 7th. They did a TV/US and that showed my uterus thickening and preparing for baby, but because my periods are irregular it was impossible to tell for sure how many weeks pregnant I was or when I ovulated. My doctor said I was VERY early by what the sonogram was showing. I went for full panel of blood work and quantitive HCG. I then went back on January 13th for another TV/US and blood work results. Doctor said according to my sonogram and blood work I was measuring around 5 weeks, which made complete sense to me. I went back again this morning, a week later, (Jan 22) and the sono tech did another TV/US and all that was visible was a (noticeably larger) gestational sac but nothing inside.. Also she said I was measuring 5w1d which is a WHOLE week off and doesn't make sense considering I've known I was pregnant for almost 3 full weeks now. Doctors and tech didn't seem too concerned at all and sent me for more blood work which I should know by Monday but I cannot stop worrying about what is actually going on! Looking to see if anyone else has been in a similar situation and had a positive outcome. Obviously super worried about this not being a viable pregnancy but hoping for the best!