Hi @mama619 and welcome to Mayo Clinic Connect. I am sorry you are having a hard time with your custody dispute. That does sound extremely draining.
You'll see that I moved your post to an established discussion where many many members have discussed PEth testing. I did this so you can meet people like @toolsd, @melanie6598, @jetpilot19, @bamagunner, and @essh (who is also new to the group).

Have you researched false positive PEth tests?