My husband has been sick for 6 months+, his symptoms are extreme coughing attacks, with large amounts of clear phlem, sore throat at times, extreme tiredness, and over this period of time he has been to the doctor three times, one time they gave him a nebulizer treatment in the ER and a prescription for a rescue inhaler, he went back to the doctor, they gave him an antibiotic, which he had a reaction to, then he went to his regular doctor they gave him a steroid injection, and the next time he went to the ER they put him on the cardiac ward for tachycardia and hypertension and a prescription for BP medicine, he is again very sick with the what seems like a lung infection this has been going on for a very long time he only has just a couple of days where he feels like he is getting better then it starts all over again, what can this be?