Not sure what to think!

Ta

It all started after we came back from our anniversary trip. I took a pregnancy test at home and was so excited, it was positive! my husband and I were both super excited! Made an appointment with obgyn. but was a 2 week wait. a few days before my appointment I started spotting with slight cramping from time to time. was scared but talked to my mother said she spotted and have cramps with her first baby, so I try not to worry but it's always on my mind. went to obgyn 2 days ago. she did an ultrasound both ways. said she couldn't see anything or find anything,then said mechanical issue. left scared I had a miscarriage from what she was saying. my husband and I walked out with question mark over our heads. went to another hospital yesterday they found my sac and did blood work. they say it 5 1/2 weeks and blood is 7000 hcg. but from my LMP I'm 8 weeks along. I'm not sure if it stopped growing at 5 1/2. tomorrow I get more blood drawn to compare. I just don't kno what to think till tomorrow's results come back. anyone go threw something like this and it turned out ok or what happen. I'm afraid it could be a miscarriage from what the first lady told me.