Hcg pregnancy test levels needed

Glo

Quick question with both of my chemicals in the prior months following Iui home pregnancy tests did not detect my Hcg levels. The first was 8.9 and the 2nd was 16.4... When i had my son I also had to do beta testing because Hcg was not showing in urine and I was almost 3 months pregnant. I’m 12dpiui and want to test but know from experience it’s pointless I will need beta anyone else have this issue?