Hi Yes I get discomfort and I have just been diagnosed with CC caused by over extertion, and I too thought I was having a heart attack. So I had the ECG and all was well, my doctor gave me Naproxen and it did not make any odds, Ibuprofen does it for me. The doctor thought the discomfort could have been a result of the Naproxen but I only took two, but who knows. I have to admit the discomfort today was less severe than yesterday which was the last day I took Naproxen.