Help!!

So I’ve been to the ER for severe cramping but no bleeding, and they did about 3-4 ultrasounds over the course of 6 days. and can’t verify if they see something that really stands out as a sac but they aren’t saying they don’t see anything at all. I’m supposed to be 6 weeks and you are supposed to see something by then! and they still can’t tell me if I’m just early or if somethings wrong! They did an ultrasound of my tubes on Sunday, and there is nothing in there. At first they thought it was an ectopic but I’m not bleeding, just really bad cramping. I thought I had a missed miscarriage so I took another test to see if the line would be fainter if my levels are going down because the cramping has been for weeks. I got a dark dark line! Woke up this morning in a lot of pain in my lower abdominal area. Should I go back to the ER for the cramping or do you think they will just make me wait a week because only time will tell? Educated opinions or experiences will help to ease my mind! Thank you! (They did blood work on Saturday and my hcG levels were 1500, did it again yesterday and my levels were over 4000. But I’m still not getting a clear answer.)

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