The best way to help a pregnant guinea pig is to let her be herself and let her have lots of time with the daddy/boyfriend, and keep her out of trouble.
No the guinea pig will no get pregnant.
Only the guinea pig she mated with but be sure to separate them after birth
When I got my guinea pig, we didn't know she was pregnant, so about a month later, my sister got one that wasn't pregnant. It was a little less that a month after that that my guinea pig had 2 babies. During that time, though, Molly, the pregnant guinea pig, was acting very territorial, and Milly, the non pregnant guinea pig, was staying by herself and not having anything to do with Molly. So make sure that if you put a pregnant guinea pig with a non pregnant guinea pig, that the non pregnant guinea pig is a girl, or else there WILL be trouble.
A guinea pig can only get pregnant if a male guinea pig has humped it. A guinea pig may have fallen pregnant while it was in the pet shop or where ever you got it. Now if you think she is pregnant it is important to research breeding guinea pigs.
I don't think there is a test to tell if a guinea pig is pregnant, but a pregnant guinea pig will not let you rub its stomach. If you are still unsure, take your guinea pig to a vet.
No, only girls get pregnant :)
No, not posible.
The guinea pig will be heavier than usual.
Yes and fast
NO.
The same thing as if it was not pregnant!
NO.