Palpitation even after closure of ASD.

Hello Dr, I had undergone surgical closure of ASDs in 2016 at Asian Heart, the surgery was performed by Dr Ramakant Panda. Since then I'm always very concerned as my heart rate triggers immediately, it spikes after climbing even 2 floors. And now since couple of days I'm having a feeling of beat skipping, earlier it was once in two days but slowing the frequency is increasing. I prefer to do 2D Echo every 6 months, i did it 10 days back Doc said it's normal. Only observation was Grade I diastolic Dysfunction. I'm very worried about this skipping beat situation as whenever that happens i go into a very different fear mode for sometimes. Need suggestions as what should I do next. I'm on Seloken XL 50 at morning daily and Telmisartan 20 for next 3 months. Please suggest as what should I do next.