I developed a cold yesterday. I slept 8 hours last night, I've been getting plenty of fluids, and I'm eating well. I haven't taken any medicine that would increase my heart rate, but its been bouncing around in the range of 105-125 all morning. My normal resting heart rate is 80. After walking across my kitchen this morning I checked my pulse, it was 142. I am not hyperventilating, but my breathing is shallow. I feel like I've been running for miles, and my body aches. Is this normal for a cold, or should I seek medical attention?