I Have Breathing Problems For Last Year And Half, I

I have breathing problems for last year and half, I wake up at night and catch my breath and my day time I am so tired with a light fever.i just change my bp meds from valsartan to losartan and amlodipine 5mg. i dont like the amlodipine besylate. I think that's what is making breathless and extremely tired, what do you think