Hi. I know without a doubt the start of my LMP (42 days ago). I had severe pain, cramping, bloating, discomfort for about 36 hours and contacted my doctor. An ultrasound revealed...nothing. No gestationl sac. My urinalysis confirmed pregnancy. My first hcg test result is only 464, which doc says is about 2-3 weeks pregnant and maybe my dates are off...maybe ovulation is in question, but my LMP and days of TTC are documented - no doubt - because we have been TTC. What should I be concerned about? And prepare myself for?