What Can Cause Dizziness And Head Ache?

good afternoon doctor
I am 36 years old, proud mother of two sons. I have been feeling a sense of dizziness whenever I bend , raise my head, lie down & turn my head sidewise, also this lasts only for a couple of seconds. Pls advise. I had done a blood sugar test , fast & with food, lipid profile, haemoglobin content tests & reports say I am all normal. But this reeling of head continues. Am I having vertigo?
regards
janaki