Justin
Junior Guinea Pig

I recently purchased a guinea pig. She is my first pet I have had in 10 years and her name is Sophie. I was so excited for her to be in my life. However after having her for a couple days I have noticed he is starting to sneeze and cough. I changed her cage and removed as much dust from the hay as possible but she is sneezing between 3-6 times a day that I have been around, coughs around 2-4 times a day and I am noticing as I write this now that she is rubbing her nose with her front paws. However she does not have any discharge from her eyes or nose.
I am very concerned about Sophie. I am a huge animal lover and want to make sure she has the best life possible. I do not know how the community is about buying animals from pet stores but I purchased her from pet smart. I have the ability to take her back within 14 days of buying her and they will take her to a vet that can maker her better. Once she gets better I can rebuy her and take her home. I want her to be healthy even if I do not own her.
So I am here pleading for information from people who have forgot more about guinea pigs then I have known in my life. What should I do? I know that pigs can hide their symptoms very well...I am worried that she might have a URI. This scares me because I am worried that I have caused her issues.
Any information would be much appreciated.