I was diagnosed with carotid artery disease last year wondering if what my doctor has done is right?

I was diagnosed with carotid artery disease last year. I am a 51 year old female. I live in a little town and was wondering if what my doctor has done so far sounds right. I was having chest pains on exertion so I went to the doctor and he did a angiogram on me. He said he found a blockage and wanted to show it to the surgeon while I was in recovery. After they discussed it he came out and told me they were going to admit me and the surgeon would put a stent in the next day. After the surgeon did another angiogram the next day to put the stent in, while I was in recovery she came and told my husband and I she didn’t put one in because the blockage was only 30-40%. I ended up in ICU that night because the nurses said I had a stent in and couldn’t leave. When I went for a follow up visit with the surgeon, she then told me the blockage was 50-60%. When I questioned that she told me it didn’t matter. She then sent me for a nuclear stress test and a ultrasound. I have been very tired and it’s hard to catch my breath. I told the doctor this and she wants me to go in and do another nuclear stress test. Is all of this necessary? Also, my brother had a hard attack when he was my age and when he finally went in he said they did a couple tests (like take blood and checked something else I can’t remember what it was) and they were able to tell right away he had had a heart attack and went in and put a stent in. Can I ask her just to put a stent in so I don’t have the worry of having a stroke? She has me taking Lipitor. 10mg. Zetia. 10mg. Amlodipine. 5mg. And Plavix 75mg.
My LDL-P was above 1000 before and now it is at 627 and my LDL-C is 56 I currently weigh 200 and am 5’6″. I have lost almost 30lbs. Since this all began. I don’t know if this has anything to do with this but I am also getting bruises all over. I was mowing the grass and the tops of my hands swelled up and bruised just from holding onto the handle.