I am about 5 years diagnosed now, was on rebif, tysabri and then fingolimod. I came off the fingolimod in Nov 2016 in preparation to start IVF, then during jan/feb this year I had the worst 2 relapses I have ever had (slap bang in the middle of our first IVF try) MRI showed at least 7 new active lesions. Neuro really wanted me to stop ivf and go straight for Lemtrada - so leave the ivf for another 2 years, I didnt want to. At one point during that appointment he got so frustrated with me he threw his hands up in the air and walked out saying he would have to get someone else to make me see sense.
I agreed that I would at the very least meet with my MS nurse about starting lemtrada, she was so much more understanding of our wants of a baby, but what was of more interest, she said it isnt unheard of for women to have a baby in between the lemtrada treatments.
I understand what you are saying about feeling selfish about wanting a baby before you are “well” - I have always had pretty bad relapses but then, luckily, recovered very well. My husband also has MS - so it as a huge decision to come off treatment for the IVF. Despite those 2 relapses I had - I am so happy I stuck to my guns and did what I wanted to do. I am older than you (33) and already much older than i wanted to be when I started a family so there was no way i was waiting another 2 years.
Pregnancy can be kind to MS, breast feeding once you deliver also offers some protection against relapse. We were lucky enough that our 2nd round of IVF worked and I am due late Jan 2017. My neuro wants me to start Lemtrada within 2 weeks of delivery, I havent decided on that yet, I cant imagine I would want to leave a newborn for 5 days (even though I can come home at night) that soon.
MS throws us so many many curve balls, its great to hear what other people did or didnt do, but I honestly believe you should go with your gut. You will always find someone who disagrees with your decision. I cant tell you how many times I/we were called selfish for trying for a baby when we both have MS - didnt stop us.
Good luck with your decision, I will be really interested how you get on whichever way you choose to go, if you dont mind sharing of course!