Weight Sow with very round tummy

Okay! SO! A couple weeks ago i bought (i know, i know. It's terrible and I know that now and if I ever get more guinea pigs i will be adopting instead) two female guinea pigs. Ginger and Apricot. They are healthy (I know I am lucky for that) but I think one of them may be pregnant? I don't know if I am being paranoid because I've searched pregnant guinea pigs a couple times and they all look extremely pear shaped and with big hips, and I also know that both of them are in fact actually females and weren't mistakenly sexed. The thing is, the only thing abnormal about Apricot is that her stomach area is extremely round. She's not pear shaped, more like an apple. If I very gently squish her tummy area it doesn't hurt her and I can only feel one lumpy thing, but I think it might just be an organ, I can't be sure though. What do I do? Should she see a vet? What do I do if she is? I've attached some photos of her so you can see what I mean. My Ginger's tummy isn't like this, hers is normal. Also, I think it might be helpful to note that I've recently started feeding them the recommended 1 cup of veggies a day, if it means anything. EDIT: i also think it would be helpful to note that she's eating and drinking a completely normal amount