hcg help

So I went in on Friday 5/28 to get my blood drawn and my hcg level was at 128. i then had to wait until Tuesday 6/1 to get them drawn again because it was memorial day weekend so not only should my numbers have doubled but they should have quadrupled and they came back at 602... is this a good trend or should i be worried? sorry, this is my first pregnancy and i’m so terrified of having a miscarriage. I also haven’t had much symptoms which doesn’t help wait her with the miscarry thought.