I Was A T A Casino Last Night I Normally

I was a t a casino last night I normally don't smoke cigarettes but I smoked a pack last night. I woke up this evening and I could barely breathe and my lungs were burning. what can I do to help them quit burning. also I have had a headache for about 2 weekd now and nothing really helps it. I take Tylenol and that doesn't even kick it,. can stress make you feel physically and mentally drained.