Dear lety028: There are many possible explanations for pain and/or discomfort. Most breast cancer is not painful. Without evaluation, it is impossible to speculate on what may be causing your discomfort. The only way to get a better idea is to have it evaluated by a doctor.
I've had breast cancer twice now and also had saline implants. It's not unusual to have little twitches or small pains, you do have scar tissue in there. I would like to say and have said it before to Drs. that dismiss the pain with breast cancer shame on you. At age 32 they tried to dismiss my lump first because of my age and second because it was painful .... breast cancer doesn't hurt....WRONG!!!!!!! If I had listened to the Drs, I would not be here today. It was cancer. Now 13 years later on the other breast when I found a lump again that hurt they did not ignore me and guess what...... CANCER again. Now at age 45 I am a survivor again. These tumors were fast growing, triple neg. I always had my annual mamms. Matter of fact I had one 2 months before I felt the painful tumor this time.
If you are concerned, trust your instincts. Get it checked.