Can’t sleep because of nerves

I had a MMC in December at 8wks5ds (baby stopped growing at 6wks2days). I had bleeding that matches up with that and had a d&c a week after finding out. January I found out I was pregnant again with beta pulls 1/24 838, 1/30 8411, 2/5 48,134. Since a really bad nausea day on Thursday (talking couldn’t get out of bed) I have had minimal symptoms just some pulling/light cramps since and exhaustion. I have a scan on Tuesday to figure out how far along I am but I took an at home test today just to ease my anxiety and that was a mistake because it lightened up a lot. Just need some reassurance, want this baby so bad