Clearblue weeks estimator?

Hi ladies so I found out I was pregnant 7 days ago. I am around 18 or 19 dpo now. I keep testing because I have had 2 chemical pregnancies. My frers are still coming out light and not super dark! And my clearblue digital is still saying pregnant 1-2. Shouldn't I be in the 2-3 weeks since conception range now? Just makes me worry my levels aren't going up like they're supposed to. I get blood testing done on Monday and Thursday but I won't know anything till Friday! What do you ladies think?