My understanding is that an MRA is used to view blood vessel structure and detail. It's not clear to me that it would adequately find a tumor.
If you are going to a neurologist I suspect you'll end up with an MRI soon enough. While not ruling out anything in particular, it might appear by your symptom description that the most serious brain cancer, GBM, may not be an issue here. GBM'rs suffer debilitating headaches (migraine level) at about 2-3 months, confusion, serious fatigue, and often times seizures.
Let's hope your headaches and vertigo are caused by some inner ear problem and not a brain tumor.