Possible miscarriage misdiagnosis!?

My breast are hurting more each day. It's been a week since I was told I was having a miscarriage, I was 4 weeks gestation with spotting for three days, but no heavy bleeding. The,spotting stopped a week ago. My breast are killing me, and no sign of mc?? Levels were 104 a,week ago, so my symptoms should have went away by now . What do y'all think. Has anyone ever been misdiagnosed?