Slow heart rate. Changes in my heart?

I'm taking lodoz 5 mg for bp and fast heart rate coz my heart rate always above 100 while awaking or walking and I also take placida 10 mg this medicine I'm using since 2 years but now my dr stopped placida 10 mg and start clonofit plus 10 mg at night and lodoz 5 mg are continuing but I notice that about 10 days my heart rate slightly slow when im resting or sleeping I checked after waking up so my heart rate around 58 to 62 then after eating or doing some work it goes to 90 in this situation when I rest my heart rate goes down to 60 to 70 and bp was 110/70 so my question is this is normal or something changes in my heart? B.coz in some days before my resting heart rate was 80 to 85 and now it's remain 60+