welcome to TIMS.
I remember feeling exactly the same when I was diagnosed (nearly 12 years ago) but I was with a guy that wasn't a long-term partner in retrospect. I waited a few years to see how my MS would develop. It was bad for about 4 years, then it improved, and I had my son nearly 10 years after diagnosis - he's 2years old now and having him was the best thing I ever did, despite it being hard to manage with MS at times. I am glad I waited because I married a great man and I cannot imagine managing without him. I suspect it could be very tough on you to be a single parent with MS if you didn't have a lot of support and help, including perhaps paid help at times when MS is bad (like with housework) - life is hard enough with MS, being a parent with MS is harder (but very very enjoyable). I hope you don't mind me being so honest but that's just my take on my situation, not yours.
I suppose it ultimately depends on how your MS effects you, what kind of pattern it has or hasnt', what support you have, how much money you have, where you live, your age, friends and family living near etc..............
Good luck and hope you're adjusting ok to living with MS.
RR-MS dx 1998 and Coeliac dx 2003
Copaxone, Cymbalta. EPO, Fish Oils, Vitamin D3 2000 IU daily, Cal/Mag/Zinc, Multivitamin/mineral, Co-Enzyme Q10, Probiotics, Milk Thistle.