sounds like you had a bit of a panic attack rio. that can make you feel out of breath as can crying very hard. in that sense its 'normal'.
you didnt do anything wrong bringing the table in. it was just a mistake. before an exam sometimes we can get so focused on what we re learning and on the stress of it we dont even think about things like whether or not we can bring a particular book in. if you re not going to be penalised for having it please try to give yourself a break because it was an honest mistake.
i do understand your feelings though and would no doubt feel exactly the same way myself.
i hope you can accept that this was nothing more than a mistake anyone could make and you are not a cheat.
be gentle with yourself right now.
biiv