Am after a 'second opinion' if anyone out there can help.

I had a heart attack on Xmas Day, didn't realise I had until the 28th when I was admitted to hospital with chest pain. Had a single stent fitted on 29th and was released from hospital on New Years Eve - with the pneumonia that I'd managed to contract while in hospital.

For the first ten days of so I was on antibiotics and from a heart and pneumonia point of view was doing great - to the point that on the 10th January I travelled 30 miles into central London to meet friends for a meal and a show and one of them drove me home with no problems - I walked and climbed stairs with no breathing problems or chest pain.

The last week or so I just seem to have gone backwards but my GP doesn't seem interested. On Thursday night I had a really bad nights sleep, was breathless on laying down and just couldnt seem to 'catch my breath' - tried sleeping propped up but that didn't work either. Rang my GP Friday morning and he sent me straight to A&E at our local hospital.

They did a set of blood tests and a single ECG and a chest xray but weren't really very helpful. They say the pneumonia has just about cleared and I don't need anything else for it, but really have no answer to the breathlessness, which doesn't help when I'm now sat here breathing beautifully for about five minutes then suddenly almost hyperventilating because I cant get any air in.

Anyone any ideas - I am getting increasingly frightened and frustrated here - have no chest pain as such but the breathing is frightening.

thanks.