first time pregnancy here! Top test was Mon. On Tues, my beta was 3570 (doubling time 41 hours). My doctor doesn’t need any more blood work and scheduled me for an ultrasound. Of course yesterday (Thurs) I take an FRER anyhow and panic bc control line darker. But this morning (Fri) it’s lighter again so do you think I’m ok and should probably stop testing like a crazy girl?