Basic Questions every lady has

M
hello Ladies, I just turned 21 and my doctor that I have regular check-ups explained to me that as soon as I turn 21yrs of age I had to get a PAP. I understand the reasons why and I am interested in getting on BC Asap bcuz I feel like its the responsible choice to make. I came across The Article on Endometris- and Im worried. Since I've never had a PAP before idk If I could have endometris...TMI but my mom has really horrible period symptons every month she doubles over in pain, increasingly fatigued etc 
​Idk how to explain to her about this condition? She is my mom and I hope thats not the case. So here are my questions: 
​1) Never had a PAP..ever!! How do I prepare for it? What questions to ask
​2) how can I tell IF i may have Endometriosis? 
​3)BC? Any recommendations? 
​I recently went to my healthcare clinic at my school for Info on Birth control. they recommended the Pill... I have no idea how to keep track of  how to take the pills. Their way of explaining confused me alot.
​4) Any advice regarding sex? Safe Sex?  I've even heard of such things as anal? ...etc
​p.s. please Help!!! And thank you for taking time to give advice?
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