HCG levels... please look

Kayla

Just wondering if my levels look like this could be a viable pregnancy?

7/25- 79

7/27- 186

7/30- 326

8/1- 592

I know that my levels have not been doubling but they are going up. I’m just worried... this is my 8th pregnancy. 7 miscarriages and 1 ectopic.