Still no AF!!

My AF is now 3 days late! I had a miscarriage about 6 months ago and I'm way to scared to get my hopes up and test😔 I'm worried about testing and not seeing my positive that I want. But my period is never late, how do I become strong enough to test again!😔😔
My cramps aren't so bad and I'm really gassy all the time. Every time I go to the bathroom I'm scared to see if it's come or not!