Weird stuff came out my vag.. Why?

Violet
I'm 16 years old. So last week on the 11th I had sex for the second time of my life. And we wore a condom. (I'm sorry but I have to say. He wasn't even hitting my G-spot so I wasn't really enjoying this, but he was loving it.) The first time we had sex we wore a Condom too. But he didn't finish inside me like this second time.
Ever since then I feel like my vag stinks like bread but like strong. And it's just runny and kinda thick and is not like so clumpy. When I'm sitting with my legs open I can smell it. (I'm thinking yeast infection) well today... I couldn't help myself... and I started to masturbate. I was laying down. As I did. It started to run out of me like water. But it was white and thick. And smells like yeast. (I'm hoping yeast infection.) But like its so weird. My vagina at times feels like it's flexing its self. And I feel like it's a little larger than how it used to be (well I mean he did stretch me out.) And I had this sharp pain in my lower left abdomen and an uncomfortable feeling in my stomach and abdominal area all day also before I masturbated. I'm just confused. I've smelt this way before. But never so strong. And I am on birth control also. I was wondering maybe it could be that. But I read the symptoms and it doesn't say anything about the weirdness I'm getting. 
I'm sorry if I sound like an amateur. But I need just a little bit of your guys thoughts and opinions
Sorry if there's typos or if I don't make sense either.