Jill, I'm so sorry to hear this. I had a scare during treatments. After my 2nd infusion my arm got really hot under the blood pressure cuff during post infusion vitals and a port was being used. My arm was somewhat swollen and hot to the touch. The Onc. thought I had a blood clot in my arm. A few days later an U/S was done and no clot was seen but something was seen on my thyroid. I had an U/S study of that and asked that the Dr. who did my 2nd biopsy read it. I guess it was a very small nodule that had already calcified and wasn't of any concern. I repeated the study in 6 months and it remained stable so was told I was OK (it was too small to even feel on palpation).