Our bodys are so weird!

Not sure is this is the right place to post. If not please remove. A little back story so according to glow I ovulated June 22nd so me being impatient I took a test on June 25th and got a faint line which I posted on here. So I kept testing the line was getting a little darker not much and I took a digit on June 27th and it said "PREGNANT" so I went to the nearest pregnancy center on July 10 to get my proof of pregnancy and it was a blazing pink line. According to my LMP June 4th I should be 9weeks 4days. I went in August 7 for my first ultrasound and the woman told me I wasn't even close to 9 weeks I was only 6weeks 1day and 6weeks 2days with twins. You lady's have a wonderful night.