I've been quit smoking for 1 month & 1 week tomorrow,
and like you I started on the 14mg patch until I got to see the nurse a week after. I explained to her that I'm already on the 14mg patch but my cravings were unbearable and I was scared I was on the verge of giving in
She then prescribed me the 21mg patch for 6 weeks with 2mg chewing gum, as and when needed but no more than 8 pieces in a day.
Since then it has been alot easier, the cravings are manageable and the only side effects I have is the achiness and itchiness of where the patch is applied.
My advice would be to try out the 21mg patch, if you do get unmanageable side effects then reduce back to the 14mg, at least it would be better than going back to smoking.
Keep us posted and Congrats on deciding to quit smoking