I'm 19 and this is my first pregnancy. I took my pregnancy test 3 weeks ago. Based on my lmp I'm supposed to be 8w4d but at my u/s today the tech told me I'm only showing a gestational sac measuring 4 weeks. They gave me a blood test said they'd call me tomorrow and sent me on my way. No explanations or anything. My doctor didn't even come in to talk to me. Just the sonogram tech. I've only bled after sex and I barely have any cramps. Do you think there's hope for me?