My mothers conversion to Judaism?

I've been doing some research and I found out my mother converted to Judaism before she married my dad (who was Jewish) but I'm not sure what kind of conversion she went through, I did some searching and I'm a bit mislead because it looks like the conversion was done a long time ago. She said she studied for 3 years and went through a mikvah, her conversion is written in some english, some hebrew and says Beth Din and has 3 rabbi signatures. I looked up the Rabbis and the 3 listed as Rabbi Charney who I can't really find anything about, some are claiming he served at a Northwest congregation that was conservative but had a Orthodox s'micha, Rabbi Jay Karzen was the 2nd rabbi and he lives in Jerusalem and is Orthodox, and Rev Noah Wolff who is the 3rd rabbi and also listed on my Bris Milah and I called him, he stated that he is Orthodox. The problem is the Beth Din is listed in Chicago and listed as a Conservative Rabbinical embly but yet the Rabbis are listed as Orthodox, how would this affect my status as a Jew or making aliyah to Israel?