Palpitations. Please help me and!

I have been on prapanol based medicine for my fast heart rate beat around a year now. Currently I am taking ciplar la 20 and beta anxit 20 for around two months after a big episode of fast rate and trembling. I am feeling better than usual but my resting heart rate is between 70-84 and around medicine time usually ( before or after too) when I do some physical work like bathing or moving around in house and anything of this type i notice my heart rate reaching to 100 and feels slight uncomfortable in head, like tightness or some head going type feeling or feeling like my around thing are about to spin. This goes very quickly u can say this stays for 10 second. Also i don't feel much strength than earlier always having fear of increasing beat. Besides my echo and ECG was normal  ecg was with statement sinus tachycardia. Is it normal or should I go to doctor. Actually I live very far from the doctor and he suggested me to take these medicines for 4 months. Please help me and thank you.