Bypass ke baad bhi saans phoolna? 68 saal mein 200 kadam pe rukna pade?

Namaste doston. Mera naam Prakash hai, 68 saal ka hoon. 5 saal pehle bypass surgery hui thi. Aaj subah thoda sa bagal mein bazaar tak gaya tha, bas 200 kadam bhi nahi honge, toh saans itna phool gaya ki rukna pada. Pehle toh aisa nahi hota tha. Kya yeh normal hai ya koi nayi problem hai? Kya koi remedy aapne try kiya hai? Main roz kapal bhati pranayam karta hoon, phir bhi aaj yeh hua. Do din pehle heart specialist ne ek naya injection bhi diya tha, shayad uska side effect ho? Ya bas umar ka asar hai? Ghabrahat bhi hoti hai thodi. Aap logon ka kya experience hai? Please batao, bahut pareshan hoon.