Suggest Treatment For Panic Attacks And Anxiety

i had three heart attacks 2 years ago and i find myself paranoid of alot of the time. Yesterday I was in an elevator and I was stuck only for a minute and I started to panic and started sweating. I then became paranoid that something was going to happen. I am also dreaming all the time that my wife is having an affair which I know she isn't. I also have a fear to fly which I never did before. What do you think my problem is?