What Might Be Some Reasons I'm Coughing?

I've been coughing really bad recently and I'm not sure why.
The last time I was coughing was when I was around smoke, but I haven't been near any ion over a year.
I wake up in the middle of the night coughing and then I can't stop coughing for like… 5-10 minutes…
My throat and chest hurt, and I'm getting stomach aches from coughing so much.
Can anyone help?

Suggestion:

I had a bad cough for about 2 weeks.

Drinking large amounts of orange juice helps somewhat.

I also tried a green tea steam. Basically you boil water, wait let the bubbles go away add green tea bags, let simmer for 10 minutes. Then put a towel over your head and put your head over the steam for about 5 minutes.

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