Post surgery- stopped antibiotics -heart

I have shoulder dislocation and have undergone muscle repair surgery on 03rd March. I was on antibiotics till 11th of March. On 12th of March, i undergone some physical exertion due to a temple visit. Suddenly my heart rate gone up to 145 and I have visited emergency. Doctor checked me, did ECG, 2d echo and said no issue with heart. He said I am dehydrated. And after a saline they ahve discharged me. But from that time, my heart rate still is around 90- 100. Usually when I am at rest, it used to be around 70-80. I had 60k units of vitamin d on 12th morning. I could not get proper sleep from the day of surgery till date. The sleep is always disturbed. I need suggestion like what to do for this heart rate issue. Is it common post surgery or should I do anything. I live in Hyderabad, any suggestions are welcome. I have some anxiety issues but never took any medication