Recently I ordered a much of m-tanks for my kayfun, I started to notice saturday night that my rib cage started to hurt quite a lot and I found it really hard to breathe. I was vaping my belgian waffle (tfa) mix, I don't know if the plastic or the flavoring started to make my rib cage hurt but it kinda scared me a bit as smoking has never done this. Wondering if this has happened to anyone else as well. Don't really know what it could be. For the time being I have stopped vaping and feel much better, have not switched back either just simply going through withdraw thinking maybe I should stop all together.