is my guinea pig pregnant or just chubby

Question
well i bought a guinea pig from the pet store April 5th and about a week later i noticed she was quite a bit chubbier she is kinda pear shaped and i think she might be pregnant and i think that i can feel baby and i was wondering if you could tell me A. if she sounded pregnant to you and B.what are some things that would help me to determine if she is
thanx
tiffany:}

Answer
From my experience, I am almost absolutely positive that your piggy will soon be a proud piggy mommy. For any other information for help go to guinealynx.com or cavyspirit.com they have a large amount of information that helped me with my piggies first pregnancy, she too was from a pet shop because they seldom separate males and females.