Does Washing Mouth With Bleach During Pregnancy Cause Any Harm?

I am four months pregnant. At the dentist office a few hours ago, as my hygienist started my tooth cleaning, she sprayed water into my mouth. It tasted horrible, and she quickly stopped and had me spit it out. Turns out the hose had not been flushed properly and had bleach in it. I did not ingest it, but it took several rinses to get the taste out of my mouth. Being pregnant, do I have anything to worry about?