My wife is 19 weeks pregnant and over the past couple days we have noticed a squishy bump underneath her breast on her left rib cage, I would say it is about the size of a golf ball, it never hurt unless she pushed down on it, but today she has woken up with it hurting very bad and she says pain is even coming into her back now at that same place in her body, she says she cant even lay on her side now, is this normal for pregnancy or should we worry?