Lisinopril and crazy thing

When I first started taking lisinopril, I had several episodes of dizziness and almost fainted. That was when I looked up the side effects and was alarmed to find out that it is made from the venom of a poisonous snake from Brazil. I stopped taking it for several months, but my blood pressure kept climbing, so finally decided to give it another try. It didn't give me any problems at first. Just before Christmas last year, I had a bad cough and congestion, for which the doctor prescribed antibiotics and cough syrup with codeine. The antibiotics did nothing for it, but the cough syrup finally gave me some relief. Since then, the congestion got a little better, then worse, with the good spells lasting only a few days, compared to the coughing getting worse and worse. Finally when my throat was very wheezy with every breath, I decided to check the symptoms of lisinopril again. I called my doctor and told her I wanted to go off of it and see if it helped. That was 10 days ago. My throat is clear now, but I still have a lot of lung congestion. The crazy thing is that my blood pressure kept going up in spite of taking lisinopril. I've been taking atenolol for years, and now the dr put me on lovaza, which brought my blood pressure down to normal within a day.
Another thing when I was taking lisinopril, I began to wonder if I had fibromyalgia because I had so much pain all over my body. I don't know it the lisinopril caused that, but I don't feel nearly as much pain since I quit taking it.