Lemtrada round 3

Need some advice! I was diagnosed with MS in 2014 I deteriorated quite quickly after being diagnosed! I was transferred to a different hospital and offered the chance of lemtrada The first session went really well and was back to work within a week, and for about 10 months after felt good but by the time I was due the next course of treatment I relapsed! I had my second course and this time was really poorly, but again for around 10 months i was feeling good, then relapsed! For around a year I felt good then bad, Went on steroids got better felt poorly again! Over the 2 years I had MRI’s sometimes they’d show no signs of active disease another it would show cause for concern! Last year I had another relapse, I was arranging a surprise party and I think generally it run me ragged and I become ill! The MRI after the relapse showed new lesions, they suggested Chemo therapy or a 3rd course of lemtrada, this was back at the start of the year and although I decided to go for lemtrada as chemo scared the life out of me, it had to be put on hold due to me having a holiday booked and not being about to travel without an immune system! The last 6 months have seen me in good health and it’s started to make me wonder whether I actually need the lemtrada now! I’m obviously not saying I’m cured or that those lesions won’t be there anymore but I’m starting to wonder that if I had another MRI that it might be different! I want to have the treatment when I really feel like I need it rather than making myself poorly when I’m feeling ok! I’m kind of hoping that because I’ve been well that the MS is again not active and was only active because I’d had a relapse all those months ago! Any advice would be appreciated!