What Causes Dizziness After Having Vaccination?

I had several vaccines a week ago for travel to India, and have been feeling dizzy ever since. My husband took the same vaccines a few days later and also felt it (like when you get off a boat, but it comes and goes). Could this be a serious symptom? (We took meningitis, typhoid, hepA, hepB, polio, and dtp). I am 5'1", 104lbs, 31yrs; he is 6', 45yrs.