Advice on Aubagio

I have been on Aubagio for about 18 months for RRMS. This year I have had numerous virus, bad colds, bronchitis, etc needing time off work. The MS nurse told me to stop tablets for 2 weeks and during this time I felt great, i was reluctant to go back on them but did. I now feel completely flat and it is making life difficult, I don’t feel anything like the same person I was in those 2 weeks. I have appointment December. I am 63 diagnosed 3 years ago and don’t want to take medication anymore but don’t know what to do? Any advice please.