Answer: Interesting question! The essence of this scenario is determining which vital signs you feel are most accurate. If a patient initially has no measurable blood pressure on multiple NIBP attempts, remains with poor pulses during your entire patient contact, and only later during transport you acquire NIBP measurements which are hypertensive, one has to wonder if these latter values (the hypertensive ones) are artifactual/unreliable.
To answer your question, this boils down to a judgment call.
We support your withholding of NTG if there is any concern about a NIBP that is un-measurable on repeated attempts.
As for a fluid bolus, given the discordant and confusing (and hopefully rare) clinical picture, we believe it could be appropriate to withhold or administer the fluid bolus and initiate rapid transport based on your clinical judgment.
As an example, a reliable BP measurement may be hard to assess in a strong combative patient, but their level of consciousness could be good evidence for decent blood pressure. In the case you provided, based upon the initial presentation, we would also support a decision to administer a fluid bolus based on the inability to obtain a BP, weak/absent distal pulses and patient presentation indicative of hypotension.