I have been using one drop of tea tree oil in a cup of water (along with peppermint) as a mouthwsh/rinse/gargle to help with bacteria and decay for my teeth. I recently found out I'm pregnant (5 weeks) and I'm worried doing this in the weeks before I knew I was pregnant may have harmed by baby. What If I accidentally swallowed some? Ive read it can be toxic when swallowed, especially when pregnant. I am freaking out. Any words of advice?