Hcg levels?

Lo💙

So I see a lot of ppl posting they’re having a baby CONGRATS!!!! But some of the tests are like 2-3 weeks far nnd with darkkkkk lines whereas mine looked like

About 3-4 weeks in

This is literally the darkest it got at 4-5 weeks

Is having really low hcg levels anything bad? I mean I’m 18w now nnd everything seems fine but is there anything I should worry about with having low levels?