Possible neuropathy symptom due to Herceptin?

I receive weekly herceptin treatments. The side effect that I am feeling is a painless sensation that first occured in my legs and then feet too. It feels like a moving sensation (like air traveling from one area to another, but on the inside, almost like a moving vibration) BUT NOT like pins and needles or numbness. Recently the sensation moved to my chest, right around my heart area and it still continues in my legs and feet. It has repeatedly occured 2 days after a treatment and lasts about 2-3 days gradually subsiding in frequency and area. It's off and on through out the day and night. Heart Echo was fine and I'm not on any other meds. I'm sorry- this is hard to describe, but it's undoubtedly due to the treatment in some way. Anyone had a similar symptom or side effect. I REALLY appreciate your thoughts and your sharing of stories. THANK YOU! Denise from Ohio