Testing with different pregnacy test help please!!!!

Brittany
So wensday I took a test n u can see a vvfl today is Friday and I took a different kinda test and not a line is on it.. Is it because one is 4 days before my missed period? And the other is a normal one? Also my period is irregular so I don't know when I'll get my period please help me!!
This is from wensday
This is from Friday (today)