. I worked out earlier in the day( 2 mile swim) a few hours later, I had shortness of breath, and when I tried to take a deep breath, I began to cough. Then I had a sudden nosebleed- it was bright red at first, and then appeared frothy. It stopped quickly, almost felt like a mucous like clot dislodged. Feel fine now. age- 47 athletic, swim and bike daily no smoke- use alcohol - a couple glasses every other week weight-190 height 6