Yeah, you started puberty, since you're growing pubic hair.
It sounds like you just started. You don't grow constantly during puberty - sometimes you'll get a growth spurt or grow for awhile, but it might pause for as long as a year. I've stopped growing for about 8 months now, but I feel different, like I want to fight or exercise, so I know my hormones are still going and I'm still going to grow.
There's nothing to worry about, you just have to wait for your body to start growing! Plus you have plenty of time untill you stop puberty (which usually ends when you're 20), so that's plenty of time to both start growing and time to do most of your growing.
No problem man