I have red bumps or blisters in the back of my throat, along with runny nose a cough but no fever. could this be mono? strep? or cold ?help?

Virus infection: That red 'rash' is called an enanthem and it could be from a virus such as adenovirus, enterovirus, or coxsackie - something like that. If this was mono or Strep, those should cause a fever and you would probably be worse. Best to get it checked with a throat exam and diagnostic tests. In the meantime, hot ginger tea or hot lemonade (lemon juice, hot water and honey) may help those symptoms.