Any ideas?

Rebecca
Hi All. My last period was the 07th of Feb. The app said i ovulate on the 23rd. My periods are always I regular so when i missed my period on the 13th of March i didnt think anything or it till i took a test on the 19th and it was positive 1-2 weeks. On the 23rd of March i went for a scan and they couldnt see anything. Had my bloods taken on that day and they come back as 356. 2 days later i went back and they was 796 so thats a good sign. Going back on Friday for a scan, do you think they will see something then? And any ideas as to when you think im due? Help xx