On Wednesday I started having some brown spotting and I freaked out so I went to the er they took some blood and urine and confirmed my pregnancy so when I went in for the vaginal ultrasound they said they couldn't see anything. The doctor said it could be because it's too small or I'm going to miscarry. He told me to make another ultrasound appointment 48 hrs later to do another one and see if they can see my baby, he said that if still nothing the only thing they can do is check my hcg levels to make sure they keep going up.. my hcg level that day was 1707 at 7 1/2 weeks pregnant..... has this happened to anyone? Do you think I will likely miscarry?