Spotting at 6 weeks??

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Did anyone else have light pink spotting at 6 weeks and go on to have a healthy pregnancy? I miscarried at 6 weeks on Christmas Day last year and am scared to death of another loss.

I was in the hospital for severe HG yesterday and my hcg levels came back 17,986 and got an ultrasound done showing a sac measuring exactly 5 weeks 6 days but with no fetal pole yet!