I Had A Stent Placed In The Lad Distally In

i had a stent placed in the lad distally in aug 100 % blockage they said it was opened blood flow was going threw stent now cardiologist said it is 100 blocked again nothing they can do did stress test came back normal im scared there is some scar tissue on bottom of lad never felt a heart attack what should i expect
or due they say do not worry