Im 41, My Heart Is Skipping Beats, It Wakes Me

Im 41, my heart is skipping beats, it wakes me up at night, it does it during the day also, sum times it takes my breath a little, I exercise and have lost 70 lbs I am now 216lbs, my doctor doesn't seem concerned but I do, my b/p is good, my energy is good most days, and I have had no real chest pains, should I seek a 2nd opinion?