vvfl getting darker I think? HELP

Kathy 🌈 • 29 ttc since 2014 3 mcs| 1 ect loss of tube| 1st IVF June19/Mc 8 weeks july19/ FET Oct19 -BFP Nov19 ....Due July/2020 Reggie born 10.07.20 👶🏼
I tested Friday bfn 
I tested yesterday really fl 
Tested this morning the line is getting darker. I'm just so scared ? Invade my period comes in 2 days , but il test tomorrow again or maybe Wednesday? 
Pics 1st this morning , last 2 yesterday 
Update has anyone felt light cramping after they have had a faint line for two days that is getting slightly darker?