Spud,
Did you have your appointment with the neurologist today? What did he/she say?
It's definitely common for you to stress over getting another Migraine. It's easier said than done to try not to focus on it. The fact that you're being proactive about the issue is a great first step in taking control. Maybe you'll be lucky and never have another one again!
I want to tell you not to be discouraged if you go through a bunch of tests that all come back negative. Blood tests, MRIs, CAT Scans and EKGs are used to rule out other possible causes. There is no one test that will tell you if you have Migraines or if you'll ever have another one again. But it's very important to go through all the testing to make sure there isn't something else going on that is giving you similar symptoms.
I would imagine your doc would prescribe an abortive medication like Imitrex, Frova or Maxalt for you to take if you have another Migraine. For so many people, these medications (a class of meds called triptans) are very effective in helping people to lessen the pain or even stop the Migraine. If this doesn't work, there are medications that you can take on a daily basis to prevent an attack, but those are usually not prescribed unless you are getting Migraines on a more consistent basis. Of course, your doctor will guide you through this process.
I'm proud of you for being so proactive. Just know that this process may take some trial and error, so patience is key.
Again, feel free to ask more questions and I hope your appointment went well!
-Katie