TTC round 2 after miscarriage

I recently had a miscarriage and just had my

D&C in February, for that pregnancy I was SUPER symptomatic (sore boobs, fatigue, short of breath)- tested positive 1 week before I was even supposed to start my period. We tracked my HCG levels all the way down to 0 so I know I don't have any residual. I didn't track my ovulation this cycle because we weren't necessarily trying but according to the app I would be about 14 DPO yesterday I got a SUPER faint line but I figured it could have just been an evap line and today it is darker but still SO faint and I don't feel pregnant at all. Is this most likely a chemical pregnancy? Or has anyone had a successful pregnancy with such faint lines this far along?