Curiosity

I have never came before, im a virgin but I've been fingered and ate out and even tried masterbating alot (I can't spell) I tried this thing and used my shower head on a harder level and sprayed down there it felt really good and then felt like a pressure and I had to stop, it didn't hurt but my legs were shaking and my clit was swollen after... How do you know when your about to cum? And any tips for masterbating without toys? I'm 16 almost 17 and mom won't allow toys but I'm horny all the time... Like all I want is someone to touch me.. and another thing, anyone else have a problem with discharge? It's like I'm wet all the time. It goes through my pants and gets on chairs like it's butt sweat but it isn't. Help!?