So I got my second shot on Thursday morning and side effects began around midnight that night. It hit pretty hard; fever, fatigue, body aches all day yesterday and at its worst, heart rate was around 80 when lying down completely relaxed (normal daytime resting for me is around 50 and nighttime resting is around 40). Went down into the mid 40s briefly during the night but stayed elevated much of the time. All the flu-like side effects are gone today, but my heart rate has still been at 65-75 all day today when sitting around, so about 15-20 beats higher than normal. Decided I felt OK enough to run, so did 5 miles easy. Didn't feel too bad, but again, heart rate was through the roof and did not match my perceived exertion. Normally I average around 150 on easy runs, but on this run it was already at 160 a mile in and hit 175 at the end. When will the heart rate return to normal? This seems to be getting kind of ridiculous because I thought I should be all back to normal now.