HCG levels at 3 1/2 are only 19??

Sh

Has anyone had their HCG levels only be at 19 at 3 1/2 weeks and continued to have a healthy pregnancy I have been having such bad anxiety since I got the results I just need some reassurance until my next blood draw in 2 weeks.... I just missed my period today ive gotten 10+ at home positive tests and am having normal cramping like I did with my first daughter...