when you got hit by the freeze, did you loss consciousness, or do you have headache yet?
If the answer is yes- then get a non contrast CT Brain and consult your physician because you can have a significant traumatic brain injury
If answer is no! Then the abdomen cramp and change of taste all are fall out of stress
and associated anxiety
I think you should patch up the matter with the boss by hook or by crook.
Anyway being busy is one thing and being negligent the other. Your body is helping you so much why should not you pay your dues by getting it checked for the lurching dangers if any.
That's your moral duty also.