Trying not to stress but I’m paranoid ☹️☹️

Ok so this time last year I had a miscarriage. April 14th (this year)I took a test and found out I was pregnant. I’ve been taking test and the test line has gotten darker and darker and now the test like is way darker than the control line according to my lmp I am 4 weeks 5 days along. I went to the er last night because I thought I had a uti due to biting when I pee and a little itchiness. Doctor ran urine and blood test and said there was absolutely nothing wrong with me. Great news. So then he ordered a Ulta sound just to see how far along I am. The lady comes in to do the ultra sound and I asked her if there was a heart beat and if I could hear it and see the baby. She said that I wasn’t far along yet and left it at that. The doctor came in a couple hours later with the results and said according to the ultrasound I couldn’t be more than 4-5 weeks. (Which is what I thought anyway) he said my hcg levels were 3216 and that they were very high. Now that’s not a concern I know being that they’re high I’m guessing (praying) the pregnancy is progressing correctly but does that high number mean anything? And the fact that he emphasized “high” mean anything? Also I was handed my discharge papers and I am to go back tomorrow to check my levels but the header on the paper was threatened miscarriage? Is there something the doctor didn’t say or was that mistakenly written? I just need a little light I’m scared shitless.