Need your help Urgently plz reply me.

Sir today while comeing bAck from my farm house by walking . I hold milk 10 kg in cattel . I m feeling like breath less and fast breath and tightness of chest in the center of my chest After come home wash my face that time no tightness . But that time i m feeling fast heart rate After i laying on bed in 3 min everting come normal after drinking water . After 1 hour i check my bp 120/80 heart rate 87 nd fever is 98.3 After that in evening i do running and walking but nothing happen . Sass b nahi fooli na chest mai kuj hua . Plz tell me keya heart attack toh nHi ho sakta ??? Because saas bahut fool gayi thi that time and chest tightness b thi . After drinking water i feel like normal . Right now my bp is 118/78 and heart rate 82 . I dnt have arm pain .