May have found bio mom using genetic genealogy. Not sure it is her, what to do?

First, I am new to these forums and this is my first post. I hope this is the best subforum for my question... My main question is, if I am not 100% sure someone is my birth mother, should I contact them anyway? I don't know what to say, what if I have the wrong person? More details: I am an adoptee who only has non-id info, and was adopted as an infant in the US in the late 60's (it was a closed adoption thru Catholic Social Services). I've never made a serious attempt to search for my birth family but have always been curious. Earlier this year I signed up for one of those genetic genealogy tests and through their database found hundreds of relatives, most of them apparently distant cousins based on the DNA results. My main reason for testing was to find out more about my DNA with respect to health, I did not expect to find close relatives. Turns out my highest DNA match was a fairly close cousin, according to the testing website's information. This surprised me, but I contacted her and she was very helpful, and even had some rather detailed family tree information to share. From this and my non-id info, we pinpointed 2 possibilities for my bio mother on one side of my cousin's family (nothing matched with my bio father info). I've done a lot of digging on the internet since then. One person seems to fit with my info better than the other (though there is nothing I have on either person to say they are NOT my bmom). I've found her Facebook page and have been thinking of contacting her that way. She also has two children, possible half-siblings of mine. All three of them do somewhat resemble me. The other person I have less info on and so far haven't found how to contact her. There also remains a possibility I am from the other side of my cousin's family, though it seems unlikely from the information available. I don't know what to do! I have spent the last several months trying to figure this out. Could it really be this easy to find her? What if she is the wrong person? What if she is my birth mother, I'm not sure I am ready for this. Has anyone else used one of these DNA testing companies to find family? Any advice/thoughts are welcome!