I have used my <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Period Tracker</a> to keep track of my cycles. My LMP was Aug 1st, which makes my due date May 8th 2018, I Recorded it in my phone. Today had an Ultrasound and they tell me your due date is wrong saying it's May 23rd. I think thats nuts. That means my LMP was on Aug 16th which is impossible bc I wasn't bleeding at all during that week. Do they get due dates wrong or no? Im supposed to be 9 weeks and 2 days today, do I just tell everyone false alarm. Im only 7 weeks?