Herceptin on April Fool's Day

I got my Herceptin treatment without too much of a problem. At first, when my temperature was taken, the thermometer read 38 degrees Celsius, making my temp a bit high. I have a cough, but in the end, I thought maybe I had a hot flash. => The nurse took my temp 2 more times, and it was normal. I asked about the tingling/slight numbness in my second and third toes on both feet, but there wasn't much of an explanation. It kinda feels like when my toes fell asleep during my wedding reception, but why would it come back 8 months later?