I Have Had Neck Pain, Headache Between Eyes, Dizziness And

I have had neck pain, headache between eyes, dizziness and one bout of vertigo upon arising early one a.m. I have a lot of allergies and take a very low dose of antihistimine/decongestant. My ears feel a little stuffy. What am I experiencing? I also have glaucoma and use eyedrops before bedtime.