I feel like I’m gaining weight rapidly but I’m not sure if I’m still growing?

I’m 17 years old, I take birth control (I was told I could gain weight) and I can barely fit into my clothes now. My stomach keeps getting bigger (to me, it seems like I’m getting fatter) but my eating habits have remained the same. I’m vegetarian and I eat mainly fruits and veggies 24/7. My shirts and pants are become tight on me and I’m super insecure about my body now. The last time I got on a scale, I weighed 160 lbs. 😔