When does first response get darker?

Testing every day since Thursday and first response isn’t getting darker and cheapies aren’t showing positive yet.

Worried since this is our first time trying after a loss and paranoid I’ll have a chemical since it isn’t darker yet and hormone usually double every 24/48 hours.

If you had this happen when did it get darker?

Not sure when my cycle will start since this was my first cycle after d/c.