Headache + eye floaters + tightness in neck

I've searched this board and others, but haven't quite found anything that exactly meets my symptoms.  Around a year ago, I developed eye floaters when I look at a blank or light surface, shortly after that I began having headaches mostly on the sides of my head or the very top.  I am also began experiencing tightness in my neck around a month ago.  Any ideas about either a cause or what type of specialist I should see?  Thanks in advance.

FYI - the chemical incorrectly labeled and used as an artificial sweetener (actually a neurotoxin, ant poison) named Aspartame/Phenylalanine/Nutra Sweet can induce 92 serious and life threatening side effects. Including Migraines and vision impairment (floaters).

If you drink diet drinks, crystal light, eat light Yoplait yogurt, eat sugar free foods, chew Dentynne gum and the like, eat Breathsaver mints, use 5 Hour Energy shots, you are ingesting this very harsh chemical each and every day. Get off of it and purge your system of it. You will feel 100 times better.

Now if you are 100% certain you do not eat foods or drink beverages with this chemical in them, then ignore my reply.

I do hope you find relief. But I would suggest making sure you are not ingesting aspartame. I was and had no idea how harmful this is. I had headaches for decades, 42 years to be exact, nearly everyday of my life. Went off Aspartame and Caffeine, feel so much better, you have no idea how much better I feel.

I no longer have a headache - at all.