Hello, I Had A Medicated Stent Placed In My LAD

Hello, I had a medicated Stent placed in my LAD 3 months ago. I have been feeling fairly well but have noticed the last week or so that I am feeling tired and sleepy all the time. After waking up from a good night sleep I feel fine but soon after I feel I could go write back to bed. I am currently doing monitored cardiac rehab 3 days a week and the Ekg's show normal during the excercise. I am worried about re stenosis. Is this possible at 3 months ?.