Is This Normal?

I was wondering if any one that has had muscle flap reconstruction after breast cancer has the same problems as I do. I get real tight muscle pain from under the left arm over to my left breast. It's like a real tight crunching pain that lasts about a minute then just stops. I can be doing any little thing to set it off like washing my hands, lifting little things not anything heavy. I would be glad of some responses so I know it's just not me.