Scared to take test.....

Mrs
I use Glow and Ovia. Glow said my period was supposed to start Monday. Ovia said it is suppose to start Friday. I haven't taken a test yet because I'm really scared. I have been having back aches, head aches, muscle cramps, boobs aches and I'm breaking out like crazy but not really any cramping. I'm so scared to take a test. Should I take a test or wait?