Hello there. So sorry you are going through this. DH was diagnosed with RRMS in 2011 - like you we have private health cover so we're able to access consultants and MRIs fairly swiftly, which meant it was diagnosed after his first 'attack', which is a small mercy when you hear of the years some people wait with the worry and uncertainty of not knowing what is going on.
We we're told to 'wait and see', and he went for three years without any further treatment.
Since his diagnosis he has had maybe 1-2 flare ups a year. Mostly fairly minor, though the last one affected his speech, and the consultant prescribed steroids. He is now under the care of the same consultant at an NHS hospital! and is considering whether he wants to start the disease modifying drugs. Our thinking is that if we can keep it to 1 minor flare up a year, then that is liveable.
We've also made some lifestyle changes which seem to have helped. He takes a v high dose vit D (I agree with others, the over the counter stuff is too low, just at the preventing rickets level, so see if a doctor can recommend a higher dose. We got a years worth off the internet at 5000somethings, compared to the 500something OTC version.). We eat less meat, and more pulses and fish. Nuts and seeds have something in the called GLA, which is important in nerve function, so I add these to porridge, soups, stews etc. I don't know if it helps physically, but it does give a sense that there is stuff we can do to help, which helps mentally with coping with the randomness.
DH makes sure to avoid getting over tired (not easy with a baby I know!).
Everyone's MS is different, and to some extent the uncertainty is by far and away the toughest part. DH hasn't told anyone bar his parents and (during the last attack, which meant he couldn't write easily) his boss. We life life as normal, but perhaps a little more 'gather yea rosebuds while yea may', taking this as a reminder to make the most of what we have now, and not put things off.