Palpitations post covid and weakness.

It's been 1.5 months covid, feeling palpitations daily on and off and weaknesses and , I have used "seroflo 250" inhaler 6 doses per day during 14 days of my covid because of shortness of breath , I don't have cough or wheezing during covid, so while inhaling seroflo started shakiness and reverse breathless ness, is it the main cause using inhaler made me to have palpitations,? not able to sleep at nights. , post covid having diagnosed with  sinusitis taking duonase and montair ab table. what's the underlying condition make me sleepless What's the thing to cure this issue I roamed to ent,cardiolgist,pulmonolgist post covid still my issue is not cleared, what am I going through? Note I was asthmatic from childhood and sinsusitis issues ,