I'm just about 11 weeks along and have been continuing to jog, albeit MUCH slower than I normally would, and often for shorter distances. But I've been a long distance runner for over a decade (marathons, trails/off-road, etc) and everything I've read basically says to just take it down a notch on the pace/distances/number of days per week - in fact, if I stopped altogether, that would be MORE unhealthy for my body.
The reality is that it depends on how I feel each day. MS sucks!!! Some days, like this morning, I felt OK when I woke up. When that happens, I eat something small (a piece of toast or half a clif bar or muesli bar) and wait 30-45 minutes or so. I change into my running clothes as soon as I can because once changed I can't NOT go! I then start walking for 5-10 minutes - if I feel good like this morning, I then start jogging and usually end up with 5.5-8K (3.5-5 miles) in total... SLOOOOOW though. If I feel like s**T I still force myself to walk 3-4 miles. And I always carry water with electrolytes in it with me, I need to drink a lot more than usual for that distance these days or I get dehydrated quickly.
Once per week I go out with my husband for a long, slow run - last weekend we did 20K, this weekend about 12K. Lots of water stops and slow shuffling for me, but I really enjoy being outside.
Honestly, even though I get tired and go to bed at like 8-9 these days, I feel so awesome after jogging or walking in the mornings. It usually holds off MS until at least the late afternoon or early evening, meaning I can get errands or work done in between. Well, most days. Some days are still 100% crap. Only a few more weeks and HOPEFULLY this nonsense will be over.