Nausea and vomiting along with nose bleeds in patient with metastatic breast cancer?

My mom was diagnosed with breast cancer at age 44 and she is now 60. For at least 10 of the past 16 years she has been on some type of chemotherapy and been through 3 different treatments of radiation for metastices to the lungs, bone, colon and liver with a second occurrence of bc in her opposite breast.

She is currently on herceptin (only). Three more tumors were found in her liver, again, and she will be starting another round of chemo next month. The insurance company denied the treatment plan her doctors wanted to start so it will more than likely be Taxol again, which she is dreading.

She has been having alot of nausea and vomiting lately and nose bleeds. I understand nausea/vomiting is common during chemo but not typical for her while on herceptin only. The nose bleeds and constant drip are also concerning to me.

She lives 300 miles away and refuses to move in with me, as all of her doctors are there, she still works full time and has a life of her own where she lives. I respect her decision but it makes me worry about her even more.

Can the vomiting and nose bleeds be due to the new tumors in her liver?