hCG levels

Amanda

So I tested positive on 2 different pregnancy tests on the 24th of April then I started testing negative. I went to the OB and done bloodwork and u/s this past Wednesday. There wasn't a sac on the u/s so I have to go back next week. My hCG levels came back as 71.9 is that normal??? Top test in pic was done on Tuesday before I went to the OB and the bottom one is from today.