Pregnancy is a great time to start listening to your body. Its your body saying "hey girl can you just take it a little bit easy and give me time to catch up!"

Don't feel guilty for stopping, and inhaling vicks will be fine I am sure. Anything to give you relieve.

My best advice though is too listen to your body telling you to take it a bit easier, and don't fight it and try not to stress about it.

Jac