I feel like im not breathing?

ok i smoked for about 2 weeks im 14 i know smoking is bad dont give me a speech about it but i feel like im not breathing deep enough and like i have something in my throat i have to take a huge breath to feel like im breathing i woke up panicing i thought i had to tell my self to breath my lungs fell ok just i have to breath deep in in order to feel like i am whats wrong ? P.S i know smoking is bad i dont plan on doing it any more dont preach me