Hcg blood test number 2

Found out I was pregnant yesterday day got a blood test done the same day and the results came back positive today !!!! My hcg level was 130  ... The doctor said that my progesterone was really great and that my hcg level was great to and she said they wanna do a second blood test Monday to see if my levels go up ??? But if everything looks good why would they need another test ??? Is that normal ???)