Most likely because she is pregenant but it could be that she is ill
Your weird
the guinea pig will not run away when it sees you, it will also seem excited to be around you.
pick it up
Either leave it, it should come off in the sawdust or wood shavings, whatever is in your guinea-pig's cage, or, you can pick up the guinea-pig and flick it or pick it off.
yes, you can and it should be fine.
Wont eat or talk. Or poop.
It depends. They certainly wont be aggresive, but if you do, make sure to spay and nueter them.
let her
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.
its normal
no the guinea pigs wont even touch the rat food THANK YOU
it doesn't now if its safe to go out.