So sorry to hear you are going through this.
One thing to remember and a very important thing to remember is - no two people will have the exact same symptoms. So if you hear of a person with MS who is in a wheel chair, or has relapse after relapse DON'T think this will be you, same as if you hear of a person with MS who is fine and rarely has a relapse - Everyone is different.
Every person is different, you don't want to get yourself down fearing the worst.
Just take it one day at a time, don't believe everything you hear about "wonder diets" or "miracle treatments". What works for one, will generally not work for everyone.
Get a good neurologist and ask lots of questions, research the internet, but again take it with a grain of salt.
Take note of symptoms, take note of what will trigger a relapse, write down questions for your neurologist and don't be afraid to ask lots questions, get second third or even fourth opinions, research the drugs they put you on, not all are the same and all have different side effects.
See if you can join a MS group in your neighbourhood or area, join MS groups on Facebook, there are lots of people who live with MS world wide and lots who live full lives, these days it is easier for you to interact with them all and get advice and help.
As for the headache, try to stay laying down, the headache can last a few hours or a few days and should settle when laying down. Just try to rest as much as you can, you need to put YOU first.
Try to keep your chin up and just take it one day at a time.