2 days late and blood test

Leah

So day 30 (usually get it on day 29) I took some cheep pregnancy tests that came with the ovulation tests I like. And they had veryyyy faint lines, though a lot of the great ladies on this this app did agree that they saw a faint line. So I went for a blood test and the result came back that I had 10 IUs of the HCG hormone. So I’m getting retested in 3 days. I’m confused with all these IU numbers... I’m thinking the number will keep going up? Since I guess technically 4 weeks? So numbers 6-24 could be normal?

Any help would be appreciated!!!