What Causes Chest Pressure And Dizziness After Heart Catherization?

I had a heart catherization 8 days ago and I still do not feel 100%. I have had one before and did not have these recuperation symptoms. I feel chest pressure, dizziness when I bend over, extreme fatique upon exerting myself and have bouts of feeling cold and then hot flashes (all of which I did not have previously). I do not know if this could still be from the anaesetic I was given or gas or both. I think I may have been given too much because I was not awake during the procedure and the recovery in the recovery room was a couple hours longer than last time. I am 68 years old. I would appreciate your opinion. Thank you so much.