Is my Beta hcg good ?

My beta was 35.3 mIU/mL September 22,2021 on September 24 it’s at 69.7mIU/mL, Just received the blood work.

My son hcg doubled show but the numbers were still high.

I’m currently 3 weeks and 6 days i think i just know my due date is June 4th, 2022 according to the doctor.

My Pregnancy test are still getting darker and darker just very slow.

Just took this test should i be worried ?