Hi Anita, it can be confusing, I had the 3 weekly treatments x 4 then went on to weekly treatments, I have found with the weekly treatments that the side effects are less severe, I have had 11 weekly treatments with the last one on Monday 21/9 woohoo, it has just been the last few weeks that any side effects have come out and my oncologist tells me that's because it is accumulative. I fair much better with the weekly treatments. I hope all goes well for you, go with what your oncologist says they will do the best for you. Take care Glynnis xx