@theache Are you taking any new medications? Many drugs can cause a headache and shortness of breath. More than likely it is the anesthesia. Plenty of fluids, and walking as you are able will help get it out your system. Make your doctor is aware of your symptoms... especially since you mentioned shortness of breath. There is a chance it is something else going on with your body other than side effects of the anesthesia.

After one surgery I had my neck hurt and I had a horrible headache.. for several months. It was some way my head had been positioned during surgery. I went through PT and no help. My family doctor back then was a DO. He did not tell me what he was going to do. He had me lay on the exam table with my head hanging over the edge and he was massaging my neck and moving my head about and all of a sudden a quick turn.. I heard a very loud, frightening pop. Immediate relief and was told to never let anyone twist my neck again. I basically had a disc slip out of place.

What I am saying is it could be your neck even if it is not hurting. Mine was hurting, but sometimes the neck doesn't hurt and will cause a headache..not just neck, but other parts of the spine too. It could even be a shoulder out of alignment. We never know what positions our bodies go through during surgery.

Please keep me updated. I care.
ZeeGee

Could be just tension or stress. Did you try to ask your doctor to give you a relaxant or so?