Hi I Have Been Having Racing Heart For A Few

Hi I have been having racing heart for a few months now, it hadn't been bad until this week, for 2 days this week it was so bad I had to stay in bed,the last 2 days not as bad but still having it, could I be getting ready to have an attack on my heart? I have been on percocet 5/325 for about 4 yes now for degenerative disc disease. I don't have money to pay for answer.