While on holiday in mexico, i experienced sudden extreme dizziness, nausea, sudden high blood pressure (normally it is low), racing pulse. what is it?

Hard to know: Could have been a lot of things some of which are serious. Should tell your doctor.

See your doctor: This problem can only be solved by seeing your doctor and being evaluated face-to-face. After a thorough examination, your doctor should be able to tell you what's wrong and what to do about it.

See your doctor: This problem can only be solved by seeing your doctor and being evaluated face-to-face. After a thorough examination, your doctor should be able to tell you what's wrong and what to do about it.