Heart Problem?

I need an advice i don't know what to do... I am 28 years old, skinny and i'm from Romania last year i've been in another city to take my last exam at faculty. When i came home i started to feel very bad (couldn't breathe and felt very dizzy ) i've been to hospital they gave me a calcium infusion and told me that i'm fine and i suffer of anxiety. When i came home the symptoms reappeared and they were worse next day again to hospital, i told them that i can't breathe and i feel very weak but no they told me im fine and i need some relaxing pills. I left the hospital and went to a private cardiologist. There i took a EKG and a black and white echocardiography the cardiologist told me that i have tachycardia and probably right bundle branch block. She prescribed me some vitamins and some calcium. I took them and felt a little better for a while until a few days ago when i started to feel bad again. Now i'm staying in bed and i can barely breath and i have to use my mouth from time to time to take air.When im awake i can adjust my breathing but when i sleep i can't so i often weak up with my head or even my whole body numb. I don't have medical insurance and the doctors here are not that good i could find 200-300 euros and go to another city but i don't know what kind of doctor and what kind of medical exam should take to find out exactly what's wrong with me.

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