Underwear and the pill

I'm turning 16 soon, and I have 2 kind of 'issues'. The first one is that me and my boyfriend are quite serious and want to have sex, but I want to be on the pill AND have condoms. How can I go about asking or telling my mum that I want to get the pill? Or should I at all? The second one is that I really want to start getting some nice underwear mostly for my own benefit, but I'm worried my mum would see it as me trying to impress my boyfriend or whatever. How can I talk to her about this?