so confused please help

Ka
I am 4+3wks and on 4+1wks I got a blood draw after get a faint but positive hpt. I just went for my second half and asked what my levels were on 4+1wks and she said they were only 3. Which is considered negative. And said if my levels aren't higher that it's a chemical pregnancy. And then I went out and bought a digital clear blue and got 
Which I got a negative before. I'm just stressed that I've got myself all worked up and it's going to be nothing. This is our rainbow baby and our baby that we lost at 20 weeks his original due date was yesterday so it's been an emotional week already. Has anyone experienced something like this??