Furbabies acting out

Is anyone else having trouble with their pets? Our dogs are usually so well behaved. Starting about a month ago they started tearing up
Small things (envelopes, mail). Then they moved on to our carpet. We ended up having to crate them while we are at work. Now last night they tore up a blanket and pillow while we were asleep. Everyone says it's because I'm pregnant and they sense in, but I'm at my wits end!