does anyone know prognosis if herceptin is stopped early

[APRILSHER2]

i was suppose to take 52 herceptin treatments but was stopped for about 2 months due to decreased heart function. wa started on heart meds and started treatments again but was stopped again about a month ago and heart scan came up in less than a month this time but my doc wont let me resume treatments too much risk on my heart. so i received 28 treatments had 24 left. my doc said with no herceptin at all the chances of no recurrance is about 30% with 52 herceptin treatments the chance of no recurrance is 80%. so where does that leave me. should i be worried. does anyone know the stats on this?