Hi Gizz 36,
Thank you for your post and your question. While I'm not a smoker, hopefully I can give you the answers you're looking for -
Withdrawals of smoking can absolutely cause changes in mood, and vaping can impact on your mood too.
Unfortunately sometimes the withdrawals can be too intense, which is why people start to smoke again - but overtime they do settle.
Here's some more info about withdrawals -
If you give Quitline a call 13 7848, they'll be able to talk to you more and have some more clarity. They also have QuitTxt which can text you strategies for managing stress and moods.