I've worked with CHS for a few years. You can actually use them to contact your birthmom/dad, whoever it is you're looking for.
Although, the only catch is that you have to pay some money but they'll let you know whether they want to be found. I also was told that you could write a letter of some sort?
Contact them about it. Everyone who works there is so nice and helpful! I'm about to use them to search soon...although it's about $500 to search for the bmom/bdad, I think in the end it'll be worth it.
<3 good luck! =)
