Hcg rising fine?

Hi ladies!

My first levels were 62 at 3wks6days

2nd was 1713 at 4wks5days

3rd 3360 4wks6days

I just got my 4th done yesterday 5wks6days and it’s 25000

But I’m a little nervous. They were tripling before and when I add that up, it’s not exactly doubling like it should be. Should I be worried? I know it’s going up great and that’s a great number but I was thinking it would’ve been a little bit more

I know I shouldn’t worry too much but it’s hard after two back to back miscarriages