SOB , FATIGUE, C/P

When I was about 21 (Im 29 now) I started having problems with SOB. I would start without warning mostly in the afternoon. I had no health insurance so couldn't get to a doc. I thought it may be asthma so I bought an OTC inhaler at Walmart. That just made it worse and I ended up going to the ER. They told me I was hyperventilating. My pulse ox was 101%. So I have delt with the problem off and on since I was 21. For about the past 2 months it has been very bad. I feel like I can not catch my breath. I can feel that my lungs are full of air but I just can't get that feeling that I have gotten enough air. It seems better when I lay down. Most days it starts in the afternoon but sometimes as soon as I get up. Within the past two months I have noticed that I have been very fatigued and have been getting c/p towards the end of the day. I work in a doctor's office and my job is very fast paced and required alot of multi-tasking. I am not complaining.....I love my job. I have seen a few docs for this before and was told it was anxiety. I do have a hx of depression and know that I have anxiety but I cant get a real dx from a doc. The ones that previously dx me with anxiety gave me no meds. Its like they think I should just live with it. Recently I saw a doc that suggested it may be pulmonary htn, gave me lasix, and did chest xray which was normal. Since taking the lasix I notice no more urination and have actually been feeling even worse. I have no swelling BLE, no cough, no wheezing, its not worse when I exercise, its actually better when I exercise. I have decided to stop the lasix and was advised by a couple of RNs that I shouldnt take it if its making me feel worse. Before this only affected me every once and while but the past two months its been daily. Its too the point I can't stand it. I dont eat dinner most nights because it seems worse when my stomach is full. It was suggested that this could be esophageal spasms but my food goes down okay. I dont feel a lump in my throat and have no other symptoms of esoph spasms other than the c/p. I feel is it anxiety because I notice it happening when I get into large crowds or get nervous, but Im not in those situations daily. I do not feel nervous or anxious daily. I tell myself Im not going to think about it so that maybe it wont occur but it does anyway. Right now its running my life. I cant enjoy myself with my family because by the time Im home from work I feel so terrible. I would appreciate any suggestions.....