Have any of you experienced a cough with MTX? I started it two weeks ago and the morning after taking it I woke up with a horrible cough. A few days later I got a stuff nose so figured it was a cold. The cough got better. I then took my next dose and the following morning the cough got worse. I've tried taking cough medicine but it does nothing and when I lay down the coughing gets much worse. During the day it isn't bad at all. As the days go on the cough gets better but not sure what will happen when I take the next dose. Any thoughts?