Hi thanks for contacting HCM... According to history you have pain after lifting heavy object .... So it could be musculoskeletal pain by muscle strain.... In heart attack constricting chest pain there along with sweating and radiate to arm, shoulder and neck... So you have not heart attack.... Take rest .... Avoid strenous work for few days... Hot compress can be applied.... Simple analgesic like paracetamol can be given... Take sleep in supine position.... Avoid movement cause pain... If needed physiotherapy help can be taken. Take care You will be alright in few days