Food aversions and dizziness at 12 weeks

Hello po! I’m currently 12 weeks and 5 days pregnant, ever since po hindi ako nakakain ng sweets like chocolates, cakes, or milktea kase sinusuka ko talaga after an hour. Recently im also experiencing dizziness. Tapos yung sister ko pinatikim ako ng decaffeinated drink na may chocolate, like after 5 mins sinuka ko agad. Is this normal po ba or do I have to be worried? Yung dizziness ko mawawala naman siya kapag mag na-nap ako. #firstmom #pregnancy