right hand on my thumb, and Index finger and my palm, pins and needles

@cute31892015 you can always ring the breast care nurses or ask a message to be sent to your oncologist. You can also see your local gp. Your sister may have a reaction to the chemo or could be neuropathy. Either way get it checked out.
You can also ring the cancer council. If in pain get some help most side effects from treatment can be helped.