Smoking making me feel nauseated?

Christina • Christina 💋
So I have been TTC for 2 months, Ive cut down my smoking massively(trying to prepare my body to stop) but now every time I have a cig, I feel light headed(not the nicotine rush type) just as if I'm going to be sick, my mouth goes very watery and tummy feels strange, does anyone know what this could be? Or why it's happening?