Abnormal stress test 11 years after cabg.... reoperation???

In 2012 at age 34 I had chest pain during exercise. Had stress test and had lad 100% blocked. Did single bypass with mammary artery. I am on all kinds of meds which I take everyday. Also have stress test every year. 2023 March 27th I had a stress test using the lexiscan drug because my heart rate never gets high enough on treadmill. First time without treadmill. Find out later I had a mild abnormality is what I think doc called it in the new lad. Next morning I had chest pains but I think they were in my head. Went to e.r. doc called me while in waiting room and told me about the abnormality and that a Cath was not mandatory but due to my past he thinks it's a good idea. Since I was already in er he admitted me and scheduled it for tomorrow instead of 10 days later. March 29th is the procedure. I'm scared to death of what the results will be. I also don't want a stent that is unnecessary but only done because of my chest pains that very well might be mental. I have exercised almost everyday for ten months. No problems. Hoping it was false positive. If I need surgery how will that happen if I already had it done once? I'm 45 and have a five year old daughter. Any advice or help will be appreciated.