I Have Anxiety

I'm new here, I am here because I have reached a breaking point, I had paramedics come to my house on Thursday night and spent the night in A&E getting blood tests done and having an ECG etc, long story short I was positive that I was dying from a heart attack or something but they gave me the all clear and sent me home early Friday morning but since then I have been dizzy, nauseous and have had shortness of breath that no matter what I do won't go away and it's been two days straight and it hasn't let up or gone away but I was told I was okay and that my heart and lungs were fine, I can deal with the nausea etc but the shortness of breath is gonna make me go over the edge, I don't know where to turn I feel like I am going mad and that something is seriously wrong with me, last night I was up until 3am or 4am with an awful taste in my mouth making me feel sick to my stomach and it wouldn't go away it's a little better right now because I have gum in my mouth and that helps the nausea too but that I could deal with, the pain I could deal with that now that I have the all clear but if my shortness of breath was anxiety wouldn't it have gone down or let up by now it gets worse at night and I am not looking forward to another night of trying to keep myself calm because this is getting too much, I don't know what to do, if anyone has ever experienced this or has any advice I'm open to anything at this point because this is just too much!