nope, no worries matey! When I was pregnant w/ Lydia, they sent me for a weekly non-stress test to monitor the heart rate, and from them I learned that the heart rate can fluctuate dramatically!!! Some days, her heart beat would be in the 160's, and on sleepy days her heart rate would be in the 130's. I am sure the dr. would tell you if there was a problem. If it were down in the 70's or 80's then I would probably get concerned. I hope that helps.