Worried HcG 22

Amber

So I am 13 dpo and tomorrow AF is supposed to start. I tested at 11 dpo and it was positive. I had a blood test this morning and HCG was only 22, should I be worried?

I had nausea and breast tenderness and still do but very mild. Cramping on and off but no spotting what so ever. What’s your thoughts and experiences?